// Copyright 2023 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package ethapi

import (
	"bytes"
	"context"
	"crypto/ecdsa"
	"crypto/sha256"
	"encoding/json"
	"errors"
	"fmt"
	"maps"
	"math/big"
	"os"
	"path/filepath"
	"reflect"
	"slices"
	"strings"
	"testing"
	"time"

	"github.com/ethereum/go-ethereum/accounts/abi"
	"github.com/ethereum/go-ethereum/internal/ethapi/override"
	"github.com/ethereum/go-ethereum/triedb"

	"github.com/ethereum/go-ethereum"
	"github.com/ethereum/go-ethereum/accounts"
	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/common/hexutil"
	"github.com/ethereum/go-ethereum/consensus"
	"github.com/ethereum/go-ethereum/consensus/beacon"
	"github.com/ethereum/go-ethereum/consensus/ethash"
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/core/bloombits"
	"github.com/ethereum/go-ethereum/core/rawdb"
	"github.com/ethereum/go-ethereum/core/state"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/core/vm"
	"github.com/ethereum/go-ethereum/crypto"
	"github.com/ethereum/go-ethereum/crypto/kzg4844"
	"github.com/ethereum/go-ethereum/ethdb"
	"github.com/ethereum/go-ethereum/event"
	"github.com/ethereum/go-ethereum/internal/blocktest"
	"github.com/ethereum/go-ethereum/params"
	"github.com/ethereum/go-ethereum/rpc"
	"github.com/holiman/uint256"
	"github.com/stretchr/testify/require"
)

func testTransactionMarshal(t *testing.T, tests []txData, config *params.ChainConfig) {
	var (
		signer = types.LatestSigner(config)
		key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
	)

	for i, tt := range tests {
		var tx2 types.Transaction
		tx, err := types.SignNewTx(key, signer, tt.Tx)
		if err != nil {
			t.Fatalf("test %d: signing failed: %v", i, err)
		}
		// Regular transaction
		if data, err := json.Marshal(tx); err != nil {
			t.Fatalf("test %d: marshalling failed; %v", i, err)
		} else if err = tx2.UnmarshalJSON(data); err != nil {
			t.Fatalf("test %d: sunmarshal failed: %v", i, err)
		} else if want, have := tx.Hash(), tx2.Hash(); want != have {
			t.Fatalf("test %d: stx changed, want %x have %x", i, want, have)
		}

		// rpcTransaction
		rpcTx := newRPCTransaction(tx, common.Hash{}, 0, 0, 0, nil, config)
		if data, err := json.Marshal(rpcTx); err != nil {
			t.Fatalf("test %d: marshalling failed; %v", i, err)
		} else if err = tx2.UnmarshalJSON(data); err != nil {
			t.Fatalf("test %d: unmarshal failed: %v", i, err)
		} else if want, have := tx.Hash(), tx2.Hash(); want != have {
			t.Fatalf("test %d: tx changed, want %x have %x", i, want, have)
		} else {
			want, have := tt.Want, string(data)
			require.JSONEqf(t, want, have, "test %d: rpc json not match, want %s have %s", i, want, have)
		}
	}
}

func TestTransaction_RoundTripRpcJSON(t *testing.T) {
	t.Parallel()

	var (
		config = params.AllEthashProtocolChanges
		tests  = allTransactionTypes(common.Address{0xde, 0xad}, config)
	)
	testTransactionMarshal(t, tests, config)
}

func TestTransactionBlobTx(t *testing.T) {
	t.Parallel()

	config := *params.TestChainConfig
	config.ShanghaiTime = new(uint64)
	config.CancunTime = new(uint64)
	tests := allBlobTxs(common.Address{0xde, 0xad}, &config)

	testTransactionMarshal(t, tests, &config)
}

type txData struct {
	Tx   types.TxData
	Want string
}

func allTransactionTypes(addr common.Address, config *params.ChainConfig) []txData {
	return []txData{
		{
			Tx: &types.LegacyTx{
				Nonce:    5,
				GasPrice: big.NewInt(6),
				Gas:      7,
				To:       &addr,
				Value:    big.NewInt(8),
				Data:     []byte{0, 1, 2, 3, 4},
				V:        big.NewInt(9),
				R:        big.NewInt(10),
				S:        big.NewInt(11),
			},
			Want: `{
				"blockHash": null,
				"blockNumber": null,
				"from": "0x71562b71999873db5b286df957af199ec94617f7",
				"gas": "0x7",
				"gasPrice": "0x6",
				"hash": "0x5f3240454cd09a5d8b1c5d651eefae7a339262875bcd2d0e6676f3d989967008",
				"input": "0x0001020304",
				"nonce": "0x5",
				"to": "0xdead000000000000000000000000000000000000",
				"transactionIndex": null,
				"value": "0x8",
				"type": "0x0",
				"chainId": "0x539",
				"v": "0xa96",
				"r": "0xbc85e96592b95f7160825d837abb407f009df9ebe8f1b9158a4b8dd093377f75",
				"s": "0x1b55ea3af5574c536967b039ba6999ef6c89cf22fc04bcb296e0e8b0b9b576f5"
			}`,
		}, {
			Tx: &types.LegacyTx{
				Nonce:    5,
				GasPrice: big.NewInt(6),
				Gas:      7,
				To:       nil,
				Value:    big.NewInt(8),
				Data:     []byte{0, 1, 2, 3, 4},
				V:        big.NewInt(32),
				R:        big.NewInt(10),
				S:        big.NewInt(11),
			},
			Want: `{
				"blockHash": null,
				"blockNumber": null,
				"from": "0x71562b71999873db5b286df957af199ec94617f7",
				"gas": "0x7",
				"gasPrice": "0x6",
				"hash": "0x806e97f9d712b6cb7e781122001380a2837531b0fc1e5f5d78174ad4cb699873",
				"input": "0x0001020304",
				"nonce": "0x5",
				"to": null,
				"transactionIndex": null,
				"value": "0x8",
				"type": "0x0",
				"chainId": "0x539",
				"v": "0xa96",
				"r": "0x9dc28b267b6ad4e4af6fe9289668f9305c2eb7a3241567860699e478af06835a",
				"s": "0xa0b51a071aa9bed2cd70aedea859779dff039e3630ea38497d95202e9b1fec7"
			}`,
		},
		{
			Tx: &types.AccessListTx{
				ChainID:  config.ChainID,
				Nonce:    5,
				GasPrice: big.NewInt(6),
				Gas:      7,
				To:       &addr,
				Value:    big.NewInt(8),
				Data:     []byte{0, 1, 2, 3, 4},
				AccessList: types.AccessList{
					types.AccessTuple{
						Address:     common.Address{0x2},
						StorageKeys: []common.Hash{types.EmptyRootHash},
					},
				},
				V: big.NewInt(32),
				R: big.NewInt(10),
				S: big.NewInt(11),
			},
			Want: `{
				"blockHash": null,
				"blockNumber": null,
				"from": "0x71562b71999873db5b286df957af199ec94617f7",
				"gas": "0x7",
				"gasPrice": "0x6",
				"hash": "0x121347468ee5fe0a29f02b49b4ffd1c8342bc4255146bb686cd07117f79e7129",
				"input": "0x0001020304",
				"nonce": "0x5",
				"to": "0xdead000000000000000000000000000000000000",
				"transactionIndex": null,
				"value": "0x8",
				"type": "0x1",
				"accessList": [
					{
						"address": "0x0200000000000000000000000000000000000000",
						"storageKeys": [
							"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
						]
					}
				],
				"chainId": "0x539",
				"v": "0x0",
				"r": "0xf372ad499239ae11d91d34c559ffc5dab4daffc0069e03afcabdcdf231a0c16b",
				"s": "0x28573161d1f9472fa0fd4752533609e72f06414f7ab5588699a7141f65d2abf",
				"yParity": "0x0"
			}`,
		}, {
			Tx: &types.AccessListTx{
				ChainID:  config.ChainID,
				Nonce:    5,
				GasPrice: big.NewInt(6),
				Gas:      7,
				To:       nil,
				Value:    big.NewInt(8),
				Data:     []byte{0, 1, 2, 3, 4},
				AccessList: types.AccessList{
					types.AccessTuple{
						Address:     common.Address{0x2},
						StorageKeys: []common.Hash{types.EmptyRootHash},
					},
				},
				V: big.NewInt(32),
				R: big.NewInt(10),
				S: big.NewInt(11),
			},
			Want: `{
				"blockHash": null,
				"blockNumber": null,
				"from": "0x71562b71999873db5b286df957af199ec94617f7",
				"gas": "0x7",
				"gasPrice": "0x6",
				"hash": "0x067c3baebede8027b0f828a9d933be545f7caaec623b00684ac0659726e2055b",
				"input": "0x0001020304",
				"nonce": "0x5",
				"to": null,
				"transactionIndex": null,
				"value": "0x8",
				"type": "0x1",
				"accessList": [
					{
						"address": "0x0200000000000000000000000000000000000000",
						"storageKeys": [
							"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
						]
					}
				],
				"chainId": "0x539",
				"v": "0x1",
				"r": "0x542981b5130d4613897fbab144796cb36d3cb3d7807d47d9c7f89ca7745b085c",
				"s": "0x7425b9dd6c5deaa42e4ede35d0c4570c4624f68c28d812c10d806ffdf86ce63",
				"yParity": "0x1"
			}`,
		}, {
			Tx: &types.DynamicFeeTx{
				ChainID:   config.ChainID,
				Nonce:     5,
				GasTipCap: big.NewInt(6),
				GasFeeCap: big.NewInt(9),
				Gas:       7,
				To:        &addr,
				Value:     big.NewInt(8),
				Data:      []byte{0, 1, 2, 3, 4},
				AccessList: types.AccessList{
					types.AccessTuple{
						Address:     common.Address{0x2},
						StorageKeys: []common.Hash{types.EmptyRootHash},
					},
				},
				V: big.NewInt(32),
				R: big.NewInt(10),
				S: big.NewInt(11),
			},
			Want: `{
				"blockHash": null,
				"blockNumber": null,
				"from": "0x71562b71999873db5b286df957af199ec94617f7",
				"gas": "0x7",
				"gasPrice": "0x9",
				"maxFeePerGas": "0x9",
				"maxPriorityFeePerGas": "0x6",
				"hash": "0xb63e0b146b34c3e9cb7fbabb5b3c081254a7ded6f1b65324b5898cc0545d79ff",
				"input": "0x0001020304",
				"nonce": "0x5",
				"to": "0xdead000000000000000000000000000000000000",
				"transactionIndex": null,
				"value": "0x8",
				"type": "0x2",
				"accessList": [
					{
						"address": "0x0200000000000000000000000000000000000000",
						"storageKeys": [
							"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421"
						]
					}
				],
				"chainId": "0x539",
				"v": "0x1",
				"r": "0x3b167e05418a8932cd53d7578711fe1a76b9b96c48642402bb94978b7a107e80",
				"s": "0x22f98a332d15ea2cc80386c1ebaa31b0afebfa79ebc7d039a1e0074418301fef",
				"yParity": "0x1"
			}`,
		}, {
			Tx: &types.DynamicFeeTx{
				ChainID:    config.ChainID,
				Nonce:      5,
				GasTipCap:  big.NewInt(6),
				GasFeeCap:  big.NewInt(9),
				Gas:        7,
				To:         nil,
				Value:      big.NewInt(8),
				Data:       []byte{0, 1, 2, 3, 4},
				AccessList: types.AccessList{},
				V:          big.NewInt(32),
				R:          big.NewInt(10),
				S:          big.NewInt(11),
			},
			Want: `{
				"blockHash": null,
				"blockNumber": null,
				"from": "0x71562b71999873db5b286df957af199ec94617f7",
				"gas": "0x7",
				"gasPrice": "0x9",
				"maxFeePerGas": "0x9",
				"maxPriorityFeePerGas": "0x6",
				"hash": "0xcbab17ee031a9d5b5a09dff909f0a28aedb9b295ac0635d8710d11c7b806ec68",
				"input": "0x0001020304",
				"nonce": "0x5",
				"to": null,
				"transactionIndex": null,
				"value": "0x8",
				"type": "0x2",
				"accessList": [],
				"chainId": "0x539",
				"v": "0x0",
				"r": "0x6446b8a682db7e619fc6b4f6d1f708f6a17351a41c7fbd63665f469bc78b41b9",
				"s": "0x7626abc15834f391a117c63450047309dbf84c5ce3e8e609b607062641e2de43",
				"yParity": "0x0"
			}`,
		},
	}
}

func allBlobTxs(addr common.Address, config *params.ChainConfig) []txData {
	return []txData{
		{
			Tx: &types.BlobTx{
				Nonce:      6,
				GasTipCap:  uint256.NewInt(1),
				GasFeeCap:  uint256.NewInt(5),
				Gas:        6,
				To:         addr,
				BlobFeeCap: uint256.NewInt(1),
				BlobHashes: []common.Hash{{1}},
				Value:      new(uint256.Int),
				V:          uint256.NewInt(32),
				R:          uint256.NewInt(10),
				S:          uint256.NewInt(11),
			},
			Want: `{
                "blockHash": null,
                "blockNumber": null,
                "from": "0x71562b71999873db5b286df957af199ec94617f7",
                "gas": "0x6",
                "gasPrice": "0x5",
                "maxFeePerGas": "0x5",
                "maxPriorityFeePerGas": "0x1",
                "maxFeePerBlobGas": "0x1",
                "hash": "0x1f2b59a20e61efc615ad0cbe936379d6bbea6f938aafaf35eb1da05d8e7f46a3",
                "input": "0x",
                "nonce": "0x6",
                "to": "0xdead000000000000000000000000000000000000",
                "transactionIndex": null,
                "value": "0x0",
                "type": "0x3",
                "accessList": [],
                "chainId": "0x1",
                "blobVersionedHashes": [
                    "0x0100000000000000000000000000000000000000000000000000000000000000"
                ],
                "v": "0x0",
                "r": "0x618be8908e0e5320f8f3b48042a079fe5a335ebd4ed1422a7d2207cd45d872bc",
                "s": "0x27b2bc6c80e849a8e8b764d4549d8c2efac3441e73cf37054eb0a9b9f8e89b27",
                "yParity": "0x0"
            }`,
		},
	}
}

func newTestAccountManager(t *testing.T) (*accounts.Manager, accounts.Account) {
	var (
		dir        = t.TempDir()
		am         = accounts.NewManager(&accounts.Config{InsecureUnlockAllowed: true})
		b          = keystore.NewKeyStore(dir, 2, 1)
		testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
	)
	acc, err := b.ImportECDSA(testKey, "")
	if err != nil {
		t.Fatalf("failed to create test account: %v", err)
	}
	if err := b.Unlock(acc, ""); err != nil {
		t.Fatalf("failed to unlock account: %v\n", err)
	}
	am.AddBackend(b)
	return am, acc
}

type testBackend struct {
	db      ethdb.Database
	chain   *core.BlockChain
	pending *types.Block
	accman  *accounts.Manager
	acc     accounts.Account
}

func newTestBackend(t *testing.T, n int, gspec *core.Genesis, engine consensus.Engine, generator func(i int, b *core.BlockGen)) *testBackend {
	var (
		cacheConfig = &core.CacheConfig{
			TrieCleanLimit:    256,
			TrieDirtyLimit:    256,
			TrieTimeLimit:     5 * time.Minute,
			SnapshotLimit:     0,
			TrieDirtyDisabled: true, // Archive mode
		}
	)
	accman, acc := newTestAccountManager(t)
	gspec.Alloc[acc.Address] = types.Account{Balance: big.NewInt(params.Ether)}
	// Generate blocks for testing
	db, blocks, _ := core.GenerateChainWithGenesis(gspec, engine, n, generator)
	txlookupLimit := uint64(0)
	chain, err := core.NewBlockChain(db, cacheConfig, gspec, nil, engine, vm.Config{}, nil, &txlookupLimit)
	if err != nil {
		t.Fatalf("failed to create tester chain: %v", err)
	}
	if n, err := chain.InsertChain(blocks); err != nil {
		t.Fatalf("block %d: failed to insert into chain: %v", n, err)
	}

	backend := &testBackend{db: db, chain: chain, accman: accman, acc: acc}
	return backend
}

// nolint:unused
func (b *testBackend) setPendingBlock(block *types.Block) {
	b.pending = block
}

func (b testBackend) SyncProgress() ethereum.SyncProgress { return ethereum.SyncProgress{} }
func (b testBackend) SuggestGasTipCap(ctx context.Context) (*big.Int, error) {
	return big.NewInt(0), nil
}

func (b testBackend) Chain() *core.BlockChain {
	return b.chain
}

func (b testBackend) FeeHistory(ctx context.Context, blockCount uint64, lastBlock rpc.BlockNumber, rewardPercentiles []float64) (*big.Int, [][]*big.Int, []*big.Int, []float64, []*big.Int, []float64, error) {
	return nil, nil, nil, nil, nil, nil, nil
}
func (b testBackend) BlobBaseFee(ctx context.Context) *big.Int { return new(big.Int) }
func (b testBackend) ChainDb() ethdb.Database                  { return b.db }
func (b testBackend) AccountManager() *accounts.Manager        { return b.accman }
func (b testBackend) ExtRPCEnabled() bool                      { return false }
func (b testBackend) RPCGasCap() uint64                        { return 10000000 }
func (b testBackend) RPCEVMTimeout() time.Duration             { return time.Second }
func (b testBackend) RPCTxFeeCap() float64                     { return 0 }
func (b testBackend) UnprotectedAllowed() bool                 { return false }
func (b testBackend) SetHead(number uint64)                    {}
func (b testBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
	if number == rpc.LatestBlockNumber {
		return b.chain.CurrentBlock(), nil
	}
	if number == rpc.PendingBlockNumber && b.pending != nil {
		return b.pending.Header(), nil
	}
	return b.chain.GetHeaderByNumber(uint64(number)), nil
}
func (b testBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
	return b.chain.GetHeaderByHash(hash), nil
}
func (b testBackend) HeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Header, error) {
	if blockNr, ok := blockNrOrHash.Number(); ok {
		return b.HeaderByNumber(ctx, blockNr)
	}
	if blockHash, ok := blockNrOrHash.Hash(); ok {
		return b.HeaderByHash(ctx, blockHash)
	}
	panic("unknown type rpc.BlockNumberOrHash")
}

func (b testBackend) CurrentHeader() *types.Header { return b.chain.CurrentHeader() }
func (b testBackend) CurrentBlock() *types.Header  { return b.chain.CurrentBlock() }
func (b testBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
	if number == rpc.LatestBlockNumber {
		head := b.chain.CurrentBlock()
		return b.chain.GetBlock(head.Hash(), head.Number.Uint64()), nil
	}
	if number == rpc.PendingBlockNumber {
		return b.pending, nil
	}
	return b.chain.GetBlockByNumber(uint64(number)), nil
}
func (b testBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
	return b.chain.GetBlockByHash(hash), nil
}
func (b testBackend) BlockByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*types.Block, error) {
	if blockNr, ok := blockNrOrHash.Number(); ok {
		return b.BlockByNumber(ctx, blockNr)
	}
	if blockHash, ok := blockNrOrHash.Hash(); ok {
		return b.BlockByHash(ctx, blockHash)
	}
	panic("unknown type rpc.BlockNumberOrHash")
}
func (b testBackend) GetBody(ctx context.Context, hash common.Hash, number rpc.BlockNumber) (*types.Body, error) {
	return b.chain.GetBlock(hash, uint64(number.Int64())).Body(), nil
}
func (b testBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
	if number == rpc.PendingBlockNumber {
		panic("pending state not implemented")
	}
	header, err := b.HeaderByNumber(ctx, number)
	if err != nil {
		return nil, nil, err
	}
	if header == nil {
		return nil, nil, errors.New("header not found")
	}
	stateDb, err := b.chain.StateAt(header.Root)
	return stateDb, header, err
}
func (b testBackend) StateAndHeaderByNumberOrHash(ctx context.Context, blockNrOrHash rpc.BlockNumberOrHash) (*state.StateDB, *types.Header, error) {
	if blockNr, ok := blockNrOrHash.Number(); ok {
		return b.StateAndHeaderByNumber(ctx, blockNr)
	}
	panic("only implemented for number")
}
func (b testBackend) Pending() (*types.Block, types.Receipts, *state.StateDB) { panic("implement me") }
func (b testBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
	header, err := b.HeaderByHash(ctx, hash)
	if header == nil || err != nil {
		return nil, err
	}
	receipts := rawdb.ReadReceipts(b.db, hash, header.Number.Uint64(), header.Time, b.chain.Config())
	return receipts, nil
}

func (b testBackend) GetBlobSidecars(ctx context.Context, hash common.Hash) (types.BlobSidecars, error) {
	header, err := b.HeaderByHash(ctx, hash)
	if header == nil || err != nil {
		return nil, err
	}
	blobSidecars := rawdb.ReadBlobSidecars(b.db, hash, header.Number.Uint64())
	return blobSidecars, nil
}
func (b testBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int {
	if b.pending != nil && hash == b.pending.Hash() {
		return nil
	}
	return big.NewInt(1)
}
func (b testBackend) GetEVM(ctx context.Context, state *state.StateDB, header *types.Header, vmConfig *vm.Config, blockContext *vm.BlockContext) *vm.EVM {
	if vmConfig == nil {
		vmConfig = b.chain.GetVMConfig()
	}
	context := core.NewEVMBlockContext(header, b.chain, nil)
	if blockContext != nil {
		context = *blockContext
	}
	return vm.NewEVM(context, state, b.chain.Config(), *vmConfig)
}
func (b testBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
	panic("implement me")
}
func (b testBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
	panic("implement me")
}
func (b testBackend) SubscribeFinalizedHeaderEvent(ch chan<- core.FinalizedHeaderEvent) event.Subscription {
	panic("implement me")
}
func (b testBackend) SubscribeNewVoteEvent(ch chan<- core.NewVoteEvent) event.Subscription {
	panic("implement me")
}
func (b testBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
	panic("implement me")
}
func (b testBackend) GetTransaction(ctx context.Context, txHash common.Hash) (bool, *types.Transaction, common.Hash, uint64, uint64, error) {
	tx, blockHash, blockNumber, index := rawdb.ReadTransaction(b.db, txHash)
	return true, tx, blockHash, blockNumber, index, nil
}
func (b testBackend) GetPoolTransactions() (types.Transactions, error)         { panic("implement me") }
func (b testBackend) GetPoolTransaction(txHash common.Hash) *types.Transaction { panic("implement me") }
func (b testBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
	return 0, nil
}
func (b testBackend) Stats() (pending int, queued int) { panic("implement me") }
func (b testBackend) TxPoolContent() (map[common.Address][]*types.Transaction, map[common.Address][]*types.Transaction) {
	panic("implement me")
}
func (b testBackend) TxPoolContentFrom(addr common.Address) ([]*types.Transaction, []*types.Transaction) {
	panic("implement me")
}
func (b testBackend) SubscribeNewTxsEvent(events chan<- core.NewTxsEvent) event.Subscription {
	panic("implement me")
}
func (b testBackend) ChainConfig() *params.ChainConfig             { return b.chain.Config() }
func (b testBackend) Engine() consensus.Engine                     { return b.chain.Engine() }
func (b testBackend) CurrentValidators() ([]common.Address, error) { return []common.Address{}, nil }
func (b testBackend) GetLogs(ctx context.Context, blockHash common.Hash, number uint64) ([][]*types.Log, error) {
	panic("implement me")
}
func (b testBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
	panic("implement me")
}
func (b testBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
	panic("implement me")
}
func (b testBackend) SubscribePendingLogsEvent(ch chan<- []*types.Log) event.Subscription {
	panic("implement me")
}
func (b testBackend) BloomStatus() (uint64, uint64) { panic("implement me") }
func (b testBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
	panic("implement me")
}

func (b *testBackend) MevRunning() bool                       { return false }
func (b *testBackend) HasBuilder(builder common.Address) bool { return false }
func (b *testBackend) MevParams() *types.MevParams {
	return &types.MevParams{}
}
func (b *testBackend) StartMev()                                                  {}
func (b *testBackend) StopMev()                                                   {}
func (b *testBackend) AddBuilder(builder common.Address, builderUrl string) error { return nil }
func (b *testBackend) RemoveBuilder(builder common.Address) error                 { return nil }
func (b *testBackend) SendBid(ctx context.Context, bid *types.BidArgs) (common.Hash, error) {
	panic("implement me")
}
func (b *testBackend) MinerInTurn() bool { return false }
func (b *testBackend) BestBidGasFee(parentHash common.Hash) *big.Int {
	//TODO implement me
	panic("implement me")
}

func TestEstimateGas(t *testing.T) {
	t.Parallel()
	// Initialize test accounts
	var (
		accounts = newAccounts(4)
		genesis  = &core.Genesis{
			Config: params.MergedTestChainConfig,
			Alloc: types.GenesisAlloc{
				accounts[0].addr: {Balance: big.NewInt(params.Ether)},
				accounts[1].addr: {Balance: big.NewInt(params.Ether)},
				accounts[2].addr: {Balance: big.NewInt(params.Ether), Code: append(types.DelegationPrefix, accounts[3].addr.Bytes()...)},
			},
		}
		genBlocks      = 10
		signer         = types.HomesteadSigner{}
		randomAccounts = newAccounts(2)
	)
	packRevert := func(revertMessage string) []byte {
		var revertSelector = crypto.Keccak256([]byte("Error(string)"))[:4]
		stringType, _ := abi.NewType("string", "", nil)
		args := abi.Arguments{
			{Type: stringType},
		}
		encodedMessage, _ := args.Pack(revertMessage)

		return append(revertSelector, encodedMessage...)
	}

	api := NewBlockChainAPI(newTestBackend(t, genBlocks, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		// Transfer from account[0] to account[1]
		//    value: 1000 wei
		//    fee:   0 wei
		tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &accounts[1].addr, Value: big.NewInt(1000), Gas: params.TxGas, GasPrice: b.BaseFee(), Data: nil}), signer, accounts[0].key)
		b.AddTx(tx)
		b.SetPoS()
	}))

	var testSuite = []struct {
		blockNumber    rpc.BlockNumber
		call           TransactionArgs
		overrides      override.StateOverride
		blockOverrides override.BlockOverrides
		expectErr      error
		want           uint64
	}{
		//simple transfer on latest block
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &accounts[0].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: nil,
			want:      21000,
		},
		// simple transfer with insufficient funds on latest block
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &randomAccounts[0].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: core.ErrInsufficientFunds,
			want:      21000,
		},
		// empty create
		{
			blockNumber: rpc.LatestBlockNumber,
			call:        TransactionArgs{},
			expectErr:   nil,
			want:        53000,
		},
		{
			blockNumber: rpc.LatestBlockNumber,
			call:        TransactionArgs{},
			overrides: override.StateOverride{
				randomAccounts[0].addr: override.OverrideAccount{Balance: newRPCBalance(new(big.Int).Mul(big.NewInt(1), big.NewInt(params.Ether)))},
			},
			expectErr: nil,
			want:      53000,
		},
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &randomAccounts[0].addr,
				To:    &randomAccounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			overrides: override.StateOverride{
				randomAccounts[0].addr: override.OverrideAccount{Balance: newRPCBalance(big.NewInt(0))},
			},
			expectErr: core.ErrInsufficientFunds,
		},
		// Test for a bug where the gas price was set to zero but the basefee non-zero
		//
		// contract BasefeeChecker {
		//    constructor() {
		//        require(tx.gasprice >= block.basefee);
		//        if (tx.gasprice > 0) {
		//            require(block.basefee > 0);
		//        }
		//    }
		//}
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:     &accounts[0].addr,
				Input:    hex2Bytes("6080604052348015600f57600080fd5b50483a1015601c57600080fd5b60003a111560315760004811603057600080fd5b5b603f80603e6000396000f3fe6080604052600080fdfea264697066735822122060729c2cee02b10748fae5200f1c9da4661963354973d9154c13a8e9ce9dee1564736f6c63430008130033"),
				GasPrice: (*hexutil.Big)(big.NewInt(1_000_000_000)), // Legacy as pricing
			},
			expectErr: nil,
			want:      67617,
		},
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:         &accounts[0].addr,
				Input:        hex2Bytes("6080604052348015600f57600080fd5b50483a1015601c57600080fd5b60003a111560315760004811603057600080fd5b5b603f80603e6000396000f3fe6080604052600080fdfea264697066735822122060729c2cee02b10748fae5200f1c9da4661963354973d9154c13a8e9ce9dee1564736f6c63430008130033"),
				MaxFeePerGas: (*hexutil.Big)(big.NewInt(1_000_000_000)), // 1559 gas pricing
			},
			expectErr: nil,
			want:      67617,
		},
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:         &accounts[0].addr,
				Input:        hex2Bytes("6080604052348015600f57600080fd5b50483a1015601c57600080fd5b60003a111560315760004811603057600080fd5b5b603f80603e6000396000f3fe6080604052600080fdfea264697066735822122060729c2cee02b10748fae5200f1c9da4661963354973d9154c13a8e9ce9dee1564736f6c63430008130033"),
				GasPrice:     nil, // No legacy gas pricing
				MaxFeePerGas: nil, // No 1559 gas pricing
			},
			expectErr: nil,
			want:      67595,
		},
		// Blobs should have no effect on gas estimate
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:       &accounts[0].addr,
				To:         &accounts[1].addr,
				Value:      (*hexutil.Big)(big.NewInt(1)),
				BlobHashes: []common.Hash{{0x01, 0x22}},
				BlobFeeCap: (*hexutil.Big)(big.NewInt(1)),
			},
			want: 21000,
		},
		// // SPDX-License-Identifier: GPL-3.0
		//pragma solidity >=0.8.2 <0.9.0;
		//
		//contract BlockOverridesTest {
		//    function call() public view returns (uint256) {
		//        return block.number;
		//    }
		//
		//    function estimate() public view {
		//        revert(string.concat("block ", uint2str(block.number)));
		//    }
		//
		//    function uint2str(uint256 _i) internal pure returns (string memory str) {
		//        if (_i == 0) {
		//            return "0";
		//        }
		//        uint256 j = _i;
		//        uint256 length;
		//        while (j != 0) {
		//            length++;
		//            j /= 10;
		//        }
		//        bytes memory bstr = new bytes(length);
		//        uint256 k = length;
		//        j = _i;
		//        while (j != 0) {
		//            bstr[--k] = bytes1(uint8(48 + (j % 10)));
		//            j /= 10;
		//        }
		//        str = string(bstr);
		//    }
		//}
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From: &accounts[0].addr,
				To:   &accounts[1].addr,
				Data: hex2Bytes("0x3592d016"), //estimate
			},
			overrides: override.StateOverride{
				accounts[1].addr: override.OverrideAccount{
					Code: hex2Bytes("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"),
				},
			},
			blockOverrides: override.BlockOverrides{Number: (*hexutil.Big)(big.NewInt(11))},
			expectErr:      newRevertError(packRevert("block 11")),
		},
		// Should be able to send to an EIP-7702 delegated account.
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &accounts[0].addr,
				To:    &accounts[2].addr,
				Value: (*hexutil.Big)(big.NewInt(1)),
			},
			want: 21000,
		},
		// Should be able to send as EIP-7702 delegated account.
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &accounts[2].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1)),
			},
			want: 21000,
		},
	}
	for i, tc := range testSuite {
		result, err := api.EstimateGas(context.Background(), tc.call, &rpc.BlockNumberOrHash{BlockNumber: &tc.blockNumber}, &tc.overrides, &tc.blockOverrides)
		if tc.expectErr != nil {
			if err == nil {
				t.Errorf("test %d: want error %v, have nothing", i, tc.expectErr)
				continue
			}
			if !errors.Is(err, tc.expectErr) {
				if !reflect.DeepEqual(err, tc.expectErr) {
					t.Errorf("test %d: error mismatch, want %v, have %v", i, tc.expectErr, err)
				}
			}
			continue
		}
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}
		if float64(result) > float64(tc.want)*(1+estimateGasErrorRatio) {
			t.Errorf("test %d, result mismatch, have\n%v\n, want\n%v\n", i, uint64(result), tc.want)
		}
	}
}

func TestCall(t *testing.T) {
	t.Parallel()

	// Initialize test accounts
	var (
		accounts = newAccounts(3)
		dad      = common.HexToAddress("0x0000000000000000000000000000000000000dad")
		genesis  = &core.Genesis{
			Config: params.MergedTestChainConfig,
			Alloc: types.GenesisAlloc{
				accounts[0].addr: {Balance: big.NewInt(params.Ether)},
				accounts[1].addr: {Balance: big.NewInt(params.Ether)},
				accounts[2].addr: {Balance: big.NewInt(params.Ether)},
				dad: {
					Balance: big.NewInt(params.Ether),
					Nonce:   1,
					Storage: map[common.Hash]common.Hash{
						common.Hash{}: common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000001"),
					},
				},
			},
		}
		genBlocks = 10
		signer    = types.HomesteadSigner{}
	)
	api := NewBlockChainAPI(newTestBackend(t, genBlocks, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		// Transfer from account[0] to account[1]
		//    value: 1000 wei
		//    fee:   0 wei
		tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &accounts[1].addr, Value: big.NewInt(1000), Gas: params.TxGas, GasPrice: b.BaseFee(), Data: nil}), signer, accounts[0].key)
		b.AddTx(tx)
		b.SetPoS()
	}))
	randomAccounts := newAccounts(3)
	var testSuite = []struct {
		name           string
		blockNumber    rpc.BlockNumber
		overrides      override.StateOverride
		call           TransactionArgs
		blockOverrides override.BlockOverrides
		expectErr      error
		want           string
	}{
		// transfer on genesis
		{
			name:        "transfer-on-genesis",
			blockNumber: rpc.BlockNumber(0),
			call: TransactionArgs{
				From:  &accounts[0].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: nil,
			want:      "0x",
		},
		// transfer on the head
		{
			name:        "transfer-on-the-head",
			blockNumber: rpc.BlockNumber(genBlocks),
			call: TransactionArgs{
				From:  &accounts[0].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: nil,
			want:      "0x",
		},
		// transfer on a non-existent block, error expects
		{
			name:        "transfer-non-existent-block",
			blockNumber: rpc.BlockNumber(genBlocks + 1),
			call: TransactionArgs{
				From:  &accounts[0].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: errors.New("header not found"),
		},
		// transfer on the latest block
		{
			name:        "transfer-latest-block",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &accounts[0].addr,
				To:    &accounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: nil,
			want:      "0x",
		},
		// Call which can only succeed if state is state overridden
		{
			name:        "state-override-success",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &randomAccounts[0].addr,
				To:    &randomAccounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			overrides: override.StateOverride{
				randomAccounts[0].addr: override.OverrideAccount{Balance: newRPCBalance(new(big.Int).Mul(big.NewInt(1), big.NewInt(params.Ether)))},
			},
			want: "0x",
		},
		// Invalid call without state overriding
		{
			name:        "insufficient-funds-simple",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:  &randomAccounts[0].addr,
				To:    &randomAccounts[1].addr,
				Value: (*hexutil.Big)(big.NewInt(1000)),
			},
			expectErr: core.ErrInsufficientFunds,
		},
		// Successful simple contract call
		//
		// // SPDX-License-Identifier: GPL-3.0
		//
		//  pragma solidity >=0.7.0 <0.8.0;
		//
		//  /**
		//   * @title Storage
		//   * @dev Store & retrieve value in a variable
		//   */
		//  contract Storage {
		//      uint256 public number;
		//      constructor() {
		//          number = block.number;
		//      }
		//  }
		{
			name:        "simple-contract-call",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From: &randomAccounts[0].addr,
				To:   &randomAccounts[2].addr,
				Data: hex2Bytes("8381f58a"), // call number()
			},
			overrides: override.StateOverride{
				randomAccounts[2].addr: override.OverrideAccount{
					Code:      hex2Bytes("6080604052348015600f57600080fd5b506004361060285760003560e01c80638381f58a14602d575b600080fd5b60336049565b6040518082815260200191505060405180910390f35b6000548156fea2646970667358221220eab35ffa6ab2adfe380772a48b8ba78e82a1b820a18fcb6f59aa4efb20a5f60064736f6c63430007040033"),
					StateDiff: map[common.Hash]common.Hash{{}: common.BigToHash(big.NewInt(123))},
				},
			},
			want: "0x000000000000000000000000000000000000000000000000000000000000007b",
		},
		// // SPDX-License-Identifier: GPL-3.0
		//pragma solidity >=0.8.2 <0.9.0;
		//
		//contract BlockOverridesTest {
		//    function call() public view returns (uint256) {
		//        return block.number;
		//    }
		//
		//    function estimate() public view {
		//        revert(string.concat("block ", uint2str(block.number)));
		//    }
		//
		//    function uint2str(uint256 _i) internal pure returns (string memory str) {
		//        if (_i == 0) {
		//            return "0";
		//        }
		//        uint256 j = _i;
		//        uint256 length;
		//        while (j != 0) {
		//            length++;
		//            j /= 10;
		//        }
		//        bytes memory bstr = new bytes(length);
		//        uint256 k = length;
		//        j = _i;
		//        while (j != 0) {
		//            bstr[--k] = bytes1(uint8(48 + (j % 10)));
		//            j /= 10;
		//        }
		//        str = string(bstr);
		//    }
		//}
		{
			name:        "block-override-with-state-override",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From: &accounts[1].addr,
				To:   &accounts[2].addr,
				Data: hex2Bytes("0x28b5e32b"), //call
			},
			overrides: override.StateOverride{
				accounts[2].addr: override.OverrideAccount{
					Code: hex2Bytes("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"),
				},
			},
			blockOverrides: override.BlockOverrides{Number: (*hexutil.Big)(big.NewInt(11))},
			want:           "0x000000000000000000000000000000000000000000000000000000000000000b",
		},
		// Clear storage trie
		{
			name:        "clear-storage-trie",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From: &accounts[1].addr,
				// Yul:
				// object "Test" {
				//    code {
				//        let dad := 0x0000000000000000000000000000000000000dad
				//        if eq(balance(dad), 0) {
				//            revert(0, 0)
				//        }
				//        let slot := sload(0)
				//        mstore(0, slot)
				//        return(0, 32)
				//    }
				// }
				Input: hex2Bytes("610dad6000813103600f57600080fd5b6000548060005260206000f3"),
			},
			overrides: override.StateOverride{
				dad: override.OverrideAccount{
					State: map[common.Hash]common.Hash{},
				},
			},
			want: "0x0000000000000000000000000000000000000000000000000000000000000000",
		},
		// Invalid blob tx
		{
			name:        "invalid-blob-tx",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:       &accounts[1].addr,
				Input:      &hexutil.Bytes{0x00},
				BlobHashes: []common.Hash{},
			},
			expectErr: core.ErrBlobTxCreate,
		},
		// BLOBHASH opcode
		{
			name:        "blobhash-opcode",
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From:       &accounts[1].addr,
				To:         &randomAccounts[2].addr,
				BlobHashes: []common.Hash{{0x01, 0x22}},
				BlobFeeCap: (*hexutil.Big)(big.NewInt(1)),
			},
			overrides: override.StateOverride{
				randomAccounts[2].addr: {
					Code: hex2Bytes("60004960005260206000f3"),
				},
			},
			want: "0x0122000000000000000000000000000000000000000000000000000000000000",
		},
		// Clear the entire storage set
		{
			blockNumber: rpc.LatestBlockNumber,
			call: TransactionArgs{
				From: &accounts[1].addr,
				// Yul:
				// object "Test" {
				//    code {
				//        let dad := 0x0000000000000000000000000000000000000dad
				//        if eq(balance(dad), 0) {
				//            revert(0, 0)
				//        }
				//        let slot := sload(0)
				//        mstore(0, slot)
				//        return(0, 32)
				//    }
				// }
				Input: hex2Bytes("610dad6000813103600f57600080fd5b6000548060005260206000f3"),
			},
			overrides: override.StateOverride{
				dad: override.OverrideAccount{
					State: map[common.Hash]common.Hash{},
				},
			},
			want: "0x0000000000000000000000000000000000000000000000000000000000000000",
		},
	}
	for _, tc := range testSuite {
		result, err := api.Call(context.Background(), tc.call, &rpc.BlockNumberOrHash{BlockNumber: &tc.blockNumber}, &tc.overrides, &tc.blockOverrides)
		if tc.expectErr != nil {
			if err == nil {
				t.Errorf("test %s: want error %v, have nothing", tc.name, tc.expectErr)
				continue
			}
			if !errors.Is(err, tc.expectErr) {
				// Second try
				if !reflect.DeepEqual(err, tc.expectErr) {
					t.Errorf("test %s: error mismatch, want %v, have %v", tc.name, tc.expectErr, err)
				}
			}
			continue
		}
		if err != nil {
			t.Errorf("test %s: want no error, have %v", tc.name, err)
			continue
		}
		if !reflect.DeepEqual(result.String(), tc.want) {
			t.Errorf("test %s, result mismatch, have\n%v\n, want\n%v\n", tc.name, result.String(), tc.want)
		}
	}
}

func TestSimulateV1(t *testing.T) {
	t.Parallel()
	// Initialize test accounts
	var (
		accounts     = newAccounts(3)
		fixedAccount = newTestAccount()
		genBlocks    = 10
		signer       = types.HomesteadSigner{}
		cac          = common.HexToAddress("0x0000000000000000000000000000000000000cac")
		bab          = common.HexToAddress("0x0000000000000000000000000000000000000bab")
		coinbase     = "0x000000000000000000000000000000000000ffff"
		genesis      = &core.Genesis{
			Config: params.TestChainConfig,
			Alloc: types.GenesisAlloc{
				accounts[0].addr: {Balance: big.NewInt(params.Ether)},
				accounts[1].addr: {Balance: big.NewInt(params.Ether)},
				accounts[2].addr: {Balance: big.NewInt(params.Ether)},
				// Yul:
				// object "Test" {
				//     code {
				//         let dad := 0x0000000000000000000000000000000000000dad
				//         selfdestruct(dad)
				//     }
				// }
				cac: {Balance: big.NewInt(params.Ether), Code: common.Hex2Bytes("610dad80ff")},
				bab: {
					Balance: big.NewInt(1),
					// object "Test" {
					//    code {
					//        let value1 := sload(1)
					//        let value2 := sload(2)
					//
					//        // Shift value1 by 128 bits to the left by multiplying it with 2^128
					//        value1 := mul(value1, 0x100000000000000000000000000000000)
					//
					//        // Concatenate value1 and value2
					//        let concatenatedValue := add(value1, value2)
					//
					//        // Store the result in memory and return it
					//        mstore(0, concatenatedValue)
					//        return(0, 0x20)
					//    }
					// }
					Code: common.FromHex("0x600154600254700100000000000000000000000000000000820291508082018060005260206000f3"),
					Storage: map[common.Hash]common.Hash{
						common.BigToHash(big.NewInt(1)): common.BigToHash(big.NewInt(10)),
						common.BigToHash(big.NewInt(2)): common.BigToHash(big.NewInt(12)),
					},
				},
			},
		}
		sha256Address = common.BytesToAddress([]byte{0x02})
	)
	api := NewBlockChainAPI(newTestBackend(t, genBlocks, genesis, ethash.NewFaker(), func(i int, b *core.BlockGen) {
		b.SetCoinbase(common.HexToAddress(coinbase))
		// Transfer from account[0] to account[1]
		//    value: 1000 wei
		//    fee:   0 wei
		tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{
			Nonce:    uint64(i),
			To:       &accounts[1].addr,
			Value:    big.NewInt(1000),
			Gas:      params.TxGas,
			GasPrice: b.BaseFee(),
			Data:     nil,
		}), signer, accounts[0].key)
		b.AddTx(tx)
	}))
	var (
		randomAccounts   = newAccounts(4)
		latest           = rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber)
		includeTransfers = true
		validation       = true
	)
	type log struct {
		Address     common.Address `json:"address"`
		Topics      []common.Hash  `json:"topics"`
		Data        hexutil.Bytes  `json:"data"`
		BlockNumber hexutil.Uint64 `json:"blockNumber"`
		// Skip txHash
		//TxHash common.Hash `json:"transactionHash" gencodec:"required"`
		TxIndex hexutil.Uint `json:"transactionIndex"`
		//BlockHash common.Hash  `json:"blockHash"`
		Index hexutil.Uint `json:"logIndex"`
	}
	type callErr struct {
		Message string
		Code    int
	}
	type callRes struct {
		ReturnValue string `json:"returnData"`
		Error       callErr
		Logs        []log
		GasUsed     string
		Status      string
	}
	type blockRes struct {
		Number string
		//Hash   string
		// Ignore timestamp
		GasLimit      string
		GasUsed       string
		Miner         string
		BaseFeePerGas string
		Calls         []callRes
	}
	var testSuite = []struct {
		name             string
		blocks           []simBlock
		tag              rpc.BlockNumberOrHash
		includeTransfers *bool
		validation       *bool
		expectErr        error
		want             []blockRes
	}{
		// State build-up over calls:
		// First value transfer OK after state override.
		// Second one should succeed because of first transfer.
		{
			name: "simple",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[0].addr: override.OverrideAccount{Balance: newRPCBalance(big.NewInt(1000))},
				},
				Calls: []TransactionArgs{{
					From:  &randomAccounts[0].addr,
					To:    &randomAccounts[1].addr,
					Value: (*hexutil.Big)(big.NewInt(1000)),
				}, {
					From:  &randomAccounts[1].addr,
					To:    &randomAccounts[2].addr,
					Value: (*hexutil.Big)(big.NewInt(1000)),
				}, {
					To: &randomAccounts[3].addr,
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xf618",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		}, {
			// State build-up over blocks.
			name: "simple-multi-block",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[0].addr: override.OverrideAccount{Balance: newRPCBalance(big.NewInt(2000))},
				},
				Calls: []TransactionArgs{
					{
						From:  &randomAccounts[0].addr,
						To:    &randomAccounts[1].addr,
						Value: (*hexutil.Big)(big.NewInt(1000)),
					}, {
						From:  &randomAccounts[0].addr,
						To:    &randomAccounts[3].addr,
						Value: (*hexutil.Big)(big.NewInt(1000)),
					},
				},
			}, {
				StateOverrides: &override.StateOverride{
					randomAccounts[3].addr: override.OverrideAccount{Balance: newRPCBalance(big.NewInt(0))},
				},
				Calls: []TransactionArgs{
					{
						From:  &randomAccounts[1].addr,
						To:    &randomAccounts[2].addr,
						Value: (*hexutil.Big)(big.NewInt(1000)),
					},
				},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xa410",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xc",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x5208",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		}, {
			// insufficient funds
			name: "insufficient-funds",
			tag:  latest,
			blocks: []simBlock{{
				Calls: []TransactionArgs{{
					From:  &randomAccounts[0].addr,
					To:    &randomAccounts[1].addr,
					Value: (*hexutil.Big)(big.NewInt(1000)),
				}},
			}},
			want:      nil,
			expectErr: &invalidTxError{Message: fmt.Sprintf("err: insufficient funds for gas * price + value: address %s have 0 want 1000 (supplied gas 4712388)", randomAccounts[0].addr.String()), Code: errCodeInsufficientFunds},
		}, {
			// EVM error
			name: "evm-error",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: override.OverrideAccount{Code: hex2Bytes("f3")},
				},
				Calls: []TransactionArgs{{
					From: &randomAccounts[0].addr,
					To:   &randomAccounts[2].addr,
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x47e7c4",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					Error:       callErr{Message: "stack underflow (0 <=> 2)", Code: errCodeVMError},
					GasUsed:     "0x47e7c4",
					Logs:        []log{},
					Status:      "0x0",
				}},
			}},
		}, {
			// Block overrides should work, each call is simulated on a different block number
			name: "block-overrides",
			tag:  latest,
			blocks: []simBlock{{
				BlockOverrides: &override.BlockOverrides{
					Number:       (*hexutil.Big)(big.NewInt(11)),
					FeeRecipient: &cac,
				},
				Calls: []TransactionArgs{
					{
						From: &accounts[0].addr,
						Input: &hexutil.Bytes{
							0x43,             // NUMBER
							0x60, 0x00, 0x52, // MSTORE offset 0
							0x60, 0x20, 0x60, 0x00, 0xf3, // RETURN
						},
					},
				},
			}, {
				BlockOverrides: &override.BlockOverrides{
					Number: (*hexutil.Big)(big.NewInt(12)),
				},
				Calls: []TransactionArgs{{
					From: &accounts[1].addr,
					Input: &hexutil.Bytes{
						0x43,             // NUMBER
						0x60, 0x00, 0x52, // MSTORE offset 0
						0x60, 0x20, 0x60, 0x00, 0xf3,
					},
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xe891",
				Miner:         strings.ToLower(cac.String()),
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x000000000000000000000000000000000000000000000000000000000000000b",
					GasUsed:     "0xe891",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xc",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xe891",
				Miner:         strings.ToLower(cac.String()),
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x000000000000000000000000000000000000000000000000000000000000000c",
					GasUsed:     "0xe891",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Block numbers must be in order.
		{
			name: "block-number-order",
			tag:  latest,
			blocks: []simBlock{{
				BlockOverrides: &override.BlockOverrides{
					Number: (*hexutil.Big)(big.NewInt(12)),
				},
				Calls: []TransactionArgs{{
					From: &accounts[1].addr,
					Input: &hexutil.Bytes{
						0x43,             // NUMBER
						0x60, 0x00, 0x52, // MSTORE offset 0
						0x60, 0x20, 0x60, 0x00, 0xf3, // RETURN
					},
				}},
			}, {
				BlockOverrides: &override.BlockOverrides{
					Number: (*hexutil.Big)(big.NewInt(11)),
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					Input: &hexutil.Bytes{
						0x43,             // NUMBER
						0x60, 0x00, 0x52, // MSTORE offset 0
						0x60, 0x20, 0x60, 0x00, 0xf3, // RETURN
					},
				}},
			}},
			want:      []blockRes{},
			expectErr: &invalidBlockNumberError{message: "block numbers must be in order: 11 <= 12"},
		},
		// Test on solidity storage example. Set value in one call, read in next.
		{
			name: "storage-contract",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: override.OverrideAccount{
						Code: hex2Bytes("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"),
					},
				},
				Calls: []TransactionArgs{{
					// Set value to 5
					From:  &randomAccounts[0].addr,
					To:    &randomAccounts[2].addr,
					Input: hex2Bytes("6057361d0000000000000000000000000000000000000000000000000000000000000005"),
				}, {
					// Read value
					From:  &randomAccounts[0].addr,
					To:    &randomAccounts[2].addr,
					Input: hex2Bytes("2e64cec1"),
				},
				},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x10683",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0xaacc",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x0000000000000000000000000000000000000000000000000000000000000005",
					GasUsed:     "0x5bb7",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Test logs output.
		{
			name: "logs",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: override.OverrideAccount{
						// Yul code:
						// object "Test" {
						//    code {
						//        let hash:u256 := 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
						//        log1(0, 0, hash)
						//        return (0, 0)
						//    }
						// }
						Code: hex2Bytes("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff80600080a1600080f3"),
					},
				},
				Calls: []TransactionArgs{{
					From: &randomAccounts[0].addr,
					To:   &randomAccounts[2].addr,
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x5508",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					Logs: []log{{
						Address:     randomAccounts[2].addr,
						Topics:      []common.Hash{common.HexToHash("0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff")},
						BlockNumber: hexutil.Uint64(11),
						Data:        hexutil.Bytes{},
					}},
					GasUsed: "0x5508",
					Status:  "0x1",
				}},
			}},
		},
		// Test ecrecover override
		{
			name: "ecrecover-override",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: override.OverrideAccount{
						// Yul code that returns ecrecover(0, 0, 0, 0).
						// object "Test" {
						//    code {
						//        // Free memory pointer
						//        let free_ptr := mload(0x40)
						//
						//        // Initialize inputs with zeros
						//        mstore(free_ptr, 0)  // Hash
						//        mstore(add(free_ptr, 0x20), 0)  // v
						//        mstore(add(free_ptr, 0x40), 0)  // r
						//        mstore(add(free_ptr, 0x60), 0)  // s
						//
						//        // Call ecrecover precompile (at address 1) with all 0 inputs
						//        let success := staticcall(gas(), 1, free_ptr, 0x80, free_ptr, 0x20)
						//
						//        // Check if the call was successful
						//        if eq(success, 0) {
						//            revert(0, 0)
						//        }
						//
						//        // Return the recovered address
						//        return(free_ptr, 0x14)
						//    }
						// }
						Code: hex2Bytes("6040516000815260006020820152600060408201526000606082015260208160808360015afa60008103603157600080fd5b601482f3"),
					},
					common.BytesToAddress([]byte{0x01}): override.OverrideAccount{
						// Yul code that returns the address of the caller.
						// object "Test" {
						//    code {
						//        let c := caller()
						//        mstore(0, c)
						//        return(0xc, 0x14)
						//    }
						// }
						Code: hex2Bytes("33806000526014600cf3"),
					},
				},
				Calls: []TransactionArgs{{
					From: &randomAccounts[0].addr,
					To:   &randomAccounts[2].addr,
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x52f6",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					// Caller is in this case the contract that invokes ecrecover.
					ReturnValue: strings.ToLower(randomAccounts[2].addr.String()),
					GasUsed:     "0x52f6",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Test moving the sha256 precompile.
		{
			name: "precompile-move",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					sha256Address: override.OverrideAccount{
						// Yul code that returns the calldata.
						// object "Test" {
						//    code {
						//        let size := calldatasize() // Get the size of the calldata
						//
						//        // Allocate memory to store the calldata
						//        let memPtr := msize()
						//
						//        // Copy calldata to memory
						//        calldatacopy(memPtr, 0, size)
						//
						//        // Return the calldata from memory
						//        return(memPtr, size)
						//    }
						// }
						Code:             hex2Bytes("365981600082378181f3"),
						MovePrecompileTo: &randomAccounts[2].addr,
					},
				},
				Calls: []TransactionArgs{{
					From:  &randomAccounts[0].addr,
					To:    &randomAccounts[2].addr,
					Input: hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"),
				}, {
					From:  &randomAccounts[0].addr,
					To:    &sha256Address,
					Input: hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"),
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xa58c",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0xec4916dd28fc4c10d78e287ca5d9cc51ee1ae73cbfde08c6b37324cbfaac8bc5",
					GasUsed:     "0x52dc",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x0000000000000000000000000000000000000000000000000000000000000001",
					GasUsed:     "0x52b0",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Test ether transfers.
		{
			name: "transfer-logs",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[0].addr: override.OverrideAccount{
						Balance: newRPCBalance(big.NewInt(100)),
						// Yul code that transfers 100 wei to address passed in calldata:
						// object "Test" {
						//    code {
						//        let recipient := shr(96, calldataload(0))
						//        let value := 100
						//        let success := call(gas(), recipient, value, 0, 0, 0, 0)
						//        if eq(success, 0) {
						//            revert(0, 0)
						//        }
						//    }
						// }
						Code: hex2Bytes("60003560601c606460008060008084865af160008103601d57600080fd5b505050"),
					},
				},
				Calls: []TransactionArgs{{
					From:  &accounts[0].addr,
					To:    &randomAccounts[0].addr,
					Value: (*hexutil.Big)(big.NewInt(50)),
					Input: hex2Bytes(strings.TrimPrefix(fixedAccount.addr.String(), "0x")),
				}},
			}},
			includeTransfers: &includeTransfers,
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x77dc",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x77dc",
					Logs: []log{{
						Address: transferAddress,
						Topics: []common.Hash{
							transferTopic,
							addressToHash(accounts[0].addr),
							addressToHash(randomAccounts[0].addr),
						},
						Data:        hexutil.Bytes(common.BigToHash(big.NewInt(50)).Bytes()),
						BlockNumber: hexutil.Uint64(11),
					}, {
						Address: transferAddress,
						Topics: []common.Hash{
							transferTopic,
							addressToHash(randomAccounts[0].addr),
							addressToHash(fixedAccount.addr),
						},
						Data:        hexutil.Bytes(common.BigToHash(big.NewInt(100)).Bytes()),
						BlockNumber: hexutil.Uint64(11),
						Index:       hexutil.Uint(1),
					}},
					Status: "0x1",
				}},
			}},
		},
		// Tests selfdestructed contract.
		{
			name: "selfdestruct",
			tag:  latest,
			blocks: []simBlock{{
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &cac,
				}, {
					From: &accounts[0].addr,
					// Check that cac is selfdestructed and balance transferred to dad.
					// object "Test" {
					//    code {
					//        let cac := 0x0000000000000000000000000000000000000cac
					//        let dad := 0x0000000000000000000000000000000000000dad
					//        if gt(balance(cac), 0) {
					//            revert(0, 0)
					//        }
					//        if gt(extcodesize(cac), 0) {
					//            revert(0, 0)
					//        }
					//        if eq(balance(dad), 0) {
					//            revert(0, 0)
					//        }
					//    }
					// }
					Input: hex2Bytes("610cac610dad600082311115601357600080fd5b6000823b1115602157600080fd5b6000813103602e57600080fd5b5050"),
				}},
			}, {
				Calls: []TransactionArgs{{
					From:  &accounts[0].addr,
					Input: hex2Bytes("610cac610dad600082311115601357600080fd5b6000823b1115602157600080fd5b6000813103602e57600080fd5b5050"),
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x1b83f",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0xd166",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x",
					GasUsed:     "0xe6d9",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xc",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xe6d9",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0xe6d9",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Enable validation checks.
		{
			name: "validation-checks",
			tag:  latest,
			blocks: []simBlock{{
				Calls: []TransactionArgs{{
					From:  &accounts[2].addr,
					To:    &cac,
					Nonce: newUint64(2),
				}},
			}},
			validation: &validation,
			want:       nil,
			expectErr:  &invalidTxError{Message: fmt.Sprintf("err: nonce too high: address %s, tx: 2 state: 0 (supplied gas 4712388)", accounts[2].addr), Code: errCodeNonceTooHigh},
		},
		// Contract sends tx in validation mode.
		{
			name: "validation-checks-from-contract",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: override.OverrideAccount{
						Balance: newRPCBalance(big.NewInt(2098640803896784)),
						Code:    hex2Bytes("00"),
						Nonce:   newUint64(1),
					},
				},
				Calls: []TransactionArgs{{
					From:                 &randomAccounts[2].addr,
					To:                   &cac,
					Nonce:                newUint64(1),
					MaxFeePerGas:         newInt(233138868),
					MaxPriorityFeePerGas: newInt(1),
				}},
			}},
			validation: &validation,
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xd166",
				Miner:         coinbase,
				BaseFeePerGas: "0xde56ab3",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0xd166",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Successful validation
		{
			name: "validation-checks-success",
			tag:  latest,
			blocks: []simBlock{{
				BlockOverrides: &override.BlockOverrides{
					BaseFeePerGas: (*hexutil.Big)(big.NewInt(1)),
				},
				StateOverrides: &override.StateOverride{
					randomAccounts[0].addr: override.OverrideAccount{Balance: newRPCBalance(big.NewInt(10000000))},
				},
				Calls: []TransactionArgs{{
					From:         &randomAccounts[0].addr,
					To:           &randomAccounts[1].addr,
					Value:        (*hexutil.Big)(big.NewInt(1000)),
					MaxFeePerGas: (*hexutil.Big)(big.NewInt(2)),
				}},
			}},
			validation: &validation,
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x5208",
				Miner:         coinbase,
				BaseFeePerGas: "0x1",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x5208",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		// Clear storage.
		{
			name: "clear-storage",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: {
						Code: newBytes(genesis.Alloc[bab].Code),
						StateDiff: map[common.Hash]common.Hash{
							common.BigToHash(big.NewInt(1)): common.BigToHash(big.NewInt(2)),
							common.BigToHash(big.NewInt(2)): common.BigToHash(big.NewInt(3)),
						},
					},
					bab: {
						State: map[common.Hash]common.Hash{
							common.BigToHash(big.NewInt(1)): common.BigToHash(big.NewInt(1)),
						},
					},
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
				}, {
					From: &accounts[0].addr,
					To:   &bab,
				}},
			}, {
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: {
						State: map[common.Hash]common.Hash{
							common.BigToHash(big.NewInt(1)): common.BigToHash(big.NewInt(5)),
						},
					},
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xc542",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x0000000000000000000000000000000200000000000000000000000000000003",
					GasUsed:     "0x62a1",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x0000000000000000000000000000000100000000000000000000000000000000",
					GasUsed:     "0x62a1",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xc",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x62a1",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x0000000000000000000000000000000500000000000000000000000000000000",
					GasUsed:     "0x62a1",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		{
			name: "blockhash-opcode",
			tag:  latest,
			blocks: []simBlock{{
				BlockOverrides: &override.BlockOverrides{
					Number: (*hexutil.Big)(big.NewInt(12)),
				},
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: {
						Code: hex2Bytes("600035804060008103601057600080fd5b5050"),
					},
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// Phantom block after base.
					Input: uint256ToBytes(uint256.NewInt(11)),
				}, {
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// Canonical block.
					Input: uint256ToBytes(uint256.NewInt(8)),
				}, {
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// base block.
					Input: uint256ToBytes(uint256.NewInt(10)),
				}},
			}, {
				BlockOverrides: &override.BlockOverrides{
					Number: (*hexutil.Big)(big.NewInt(16)),
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// blocks[0]
					Input: uint256ToBytes(uint256.NewInt(12)),
				}, {
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// Phantom after blocks[0]
					Input: uint256ToBytes(uint256.NewInt(13)),
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x0",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls:         []callRes{},
			}, {
				Number:        "0xc",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xf864",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x52cc",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x",
					GasUsed:     "0x52cc",
					Logs:        []log{},
					Status:      "0x1",
				}, {

					ReturnValue: "0x",
					GasUsed:     "0x52cc",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xd",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x0",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls:         []callRes{},
			}, {
				Number:        "0xe",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x0",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls:         []callRes{},
			}, {
				Number:        "0xf",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x0",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls:         []callRes{},
			}, {
				Number:        "0x10",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xa598",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x",
					GasUsed:     "0x52cc",
					Logs:        []log{},
					Status:      "0x1",
				}, {

					ReturnValue: "0x",
					GasUsed:     "0x52cc",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
		{
			name: "basefee-non-validation",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: {
						// Yul code:
						// object "Test" {
						//    code {
						//        // Get the gas price from the transaction
						//        let gasPrice := gasprice()
						//
						//        // Get the base fee from the block
						//        let baseFee := basefee()
						//
						//        // Store gasPrice and baseFee in memory
						//        mstore(0x0, gasPrice)
						//        mstore(0x20, baseFee)
						//
						//        // Return the data
						//        return(0x0, 0x40)
						//    }
						// }
						Code: hex2Bytes("3a489060005260205260406000f3"),
					},
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// 0 gas price
				}, {
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// non-zero gas price
					MaxPriorityFeePerGas: newInt(1),
					MaxFeePerGas:         newInt(2),
				},
				},
			}, {
				BlockOverrides: &override.BlockOverrides{
					BaseFeePerGas: (*hexutil.Big)(big.NewInt(1)),
				},
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// 0 gas price
				}, {
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
					// non-zero gas price
					MaxPriorityFeePerGas: newInt(1),
					MaxFeePerGas:         newInt(2),
				},
				},
			}, {
				// Base fee should be 0 to zero even if it was set in previous block.
				Calls: []TransactionArgs{{
					From: &accounts[0].addr,
					To:   &randomAccounts[2].addr,
				}},
			}},
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xa44e",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
					GasUsed:     "0x5227",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x00000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000",
					GasUsed:     "0x5227",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xc",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0xa44e",
				Miner:         coinbase,
				BaseFeePerGas: "0x1",
				Calls: []callRes{{
					ReturnValue: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001",
					GasUsed:     "0x5227",
					Logs:        []log{},
					Status:      "0x1",
				}, {
					ReturnValue: "0x00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001",
					GasUsed:     "0x5227",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}, {
				Number:        "0xd",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x5227",
				Miner:         coinbase,
				BaseFeePerGas: "0x0",
				Calls: []callRes{{
					ReturnValue: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
					GasUsed:     "0x5227",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		}, {
			name: "basefee-validation-mode",
			tag:  latest,
			blocks: []simBlock{{
				StateOverrides: &override.StateOverride{
					randomAccounts[2].addr: {
						// Yul code:
						// object "Test" {
						//    code {
						//        // Get the gas price from the transaction
						//        let gasPrice := gasprice()
						//
						//        // Get the base fee from the block
						//        let baseFee := basefee()
						//
						//        // Store gasPrice and baseFee in memory
						//        mstore(0x0, gasPrice)
						//        mstore(0x20, baseFee)
						//
						//        // Return the data
						//        return(0x0, 0x40)
						//    }
						// }
						Code: hex2Bytes("3a489060005260205260406000f3"),
					},
				},
				Calls: []TransactionArgs{{
					From:                 &accounts[0].addr,
					To:                   &randomAccounts[2].addr,
					MaxFeePerGas:         newInt(233138868),
					MaxPriorityFeePerGas: newInt(1),
				}},
			}},
			validation: &validation,
			want: []blockRes{{
				Number:        "0xb",
				GasLimit:      "0x47e7c4",
				GasUsed:       "0x5227",
				Miner:         coinbase,
				BaseFeePerGas: "0xde56ab3",
				Calls: []callRes{{
					ReturnValue: "0x000000000000000000000000000000000000000000000000000000000de56ab4000000000000000000000000000000000000000000000000000000000de56ab3",
					GasUsed:     "0x5227",
					Logs:        []log{},
					Status:      "0x1",
				}},
			}},
		},
	}

	for _, tc := range testSuite {
		t.Run(tc.name, func(t *testing.T) {
			opts := simOpts{BlockStateCalls: tc.blocks}
			if tc.includeTransfers != nil && *tc.includeTransfers {
				opts.TraceTransfers = true
			}
			if tc.validation != nil && *tc.validation {
				opts.Validation = true
			}
			result, err := api.SimulateV1(context.Background(), opts, &tc.tag)
			if tc.expectErr != nil {
				if err == nil {
					t.Fatalf("test %s: want error %v, have nothing", tc.name, tc.expectErr)
				}
				if !errors.Is(err, tc.expectErr) {
					// Second try
					if !reflect.DeepEqual(err, tc.expectErr) {
						t.Errorf("test %s: error mismatch, want %v, have %v", tc.name, tc.expectErr, err)
					}
				}
				return
			}
			if err != nil {
				t.Fatalf("test %s: want no error, have %v", tc.name, err)
			}
			// Turn result into res-struct
			var have []blockRes
			resBytes, _ := json.Marshal(result)
			if err := json.Unmarshal(resBytes, &have); err != nil {
				t.Fatalf("failed to unmarshal result: %v", err)
			}
			if !reflect.DeepEqual(have, tc.want) {
				t.Log(string(resBytes))
				t.Errorf("test %s, result mismatch, have\n%v\n, want\n%v\n", tc.name, have, tc.want)
			}
		})
	}
}

func TestSignTransaction(t *testing.T) {
	t.Parallel()
	// Initialize test accounts
	var (
		key, _  = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
		to      = crypto.PubkeyToAddress(key.PublicKey)
		genesis = &core.Genesis{
			Config: params.MergedTestChainConfig,
			Alloc:  types.GenesisAlloc{},
		}
	)
	b := newTestBackend(t, 1, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		b.SetPoS()
	})
	api := NewTransactionAPI(b, nil)
	res, err := api.FillTransaction(context.Background(), TransactionArgs{
		From:  &b.acc.Address,
		To:    &to,
		Value: (*hexutil.Big)(big.NewInt(1)),
	})
	if err != nil {
		t.Fatalf("failed to fill tx defaults: %v\n", err)
	}

	res, err = api.SignTransaction(context.Background(), argsFromTransaction(res.Tx, b.acc.Address))
	if err != nil {
		t.Fatalf("failed to sign tx: %v\n", err)
	}
	tx, err := json.Marshal(res.Tx)
	if err != nil {
		t.Fatal(err)
	}
	expect := `{"type":"0x2","chainId":"0x1","nonce":"0x0","to":"0x703c4b2bd70c169f5717101caee543299fc946c7","gas":"0x5208","gasPrice":null,"maxPriorityFeePerGas":"0x0","maxFeePerGas":"0x684ee180","value":"0x1","input":"0x","accessList":[],"v":"0x0","r":"0x8fabeb142d585dd9247f459f7e6fe77e2520c88d50ba5d220da1533cea8b34e1","s":"0x582dd68b21aef36ba23f34e49607329c20d981d30404daf749077f5606785ce7","yParity":"0x0","hash":"0x93927839207cfbec395da84b8a2bc38b7b65d2cb2819e9fef1f091f5b1d4cc8f"}`
	if !bytes.Equal(tx, []byte(expect)) {
		t.Errorf("result mismatch. Have:\n%s\nWant:\n%s\n", tx, expect)
	}
}

func TestSignBlobTransaction(t *testing.T) {
	t.Parallel()
	// Initialize test accounts
	var (
		key, _  = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
		to      = crypto.PubkeyToAddress(key.PublicKey)
		genesis = &core.Genesis{
			Config: params.MergedTestChainConfig,
			Alloc:  types.GenesisAlloc{},
		}
	)
	b := newTestBackend(t, 1, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		b.SetPoS()
	})
	api := NewTransactionAPI(b, nil)
	res, err := api.FillTransaction(context.Background(), TransactionArgs{
		From:       &b.acc.Address,
		To:         &to,
		Value:      (*hexutil.Big)(big.NewInt(1)),
		BlobHashes: []common.Hash{{0x01, 0x22}},
	})
	if err != nil {
		t.Fatalf("failed to fill tx defaults: %v\n", err)
	}

	_, err = api.SignTransaction(context.Background(), argsFromTransaction(res.Tx, b.acc.Address))
	if err != nil {
		t.Fatalf("should not fail on blob transaction")
	}
}

func TestSendBlobTransaction(t *testing.T) {
	t.Parallel()
	// Initialize test accounts
	var (
		key, _  = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
		to      = crypto.PubkeyToAddress(key.PublicKey)
		genesis = &core.Genesis{
			Config: params.MergedTestChainConfig,
			Alloc:  types.GenesisAlloc{},
		}
	)
	b := newTestBackend(t, 1, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		b.SetPoS()
	})
	api := NewTransactionAPI(b, nil)
	res, err := api.FillTransaction(context.Background(), TransactionArgs{
		From:       &b.acc.Address,
		To:         &to,
		Value:      (*hexutil.Big)(big.NewInt(1)),
		BlobHashes: []common.Hash{{0x01, 0x22}},
	})
	if err != nil {
		t.Fatalf("failed to fill tx defaults: %v\n", err)
	}

	_, err = api.SendTransaction(context.Background(), argsFromTransaction(res.Tx, b.acc.Address))
	if err == nil {
		t.Errorf("sending tx should have failed")
	} else if !errors.Is(err, errBlobTxNotSupported) {
		t.Errorf("unexpected error. Have %v, want %v\n", err, errBlobTxNotSupported)
	}
}

func TestFillBlobTransaction(t *testing.T) {
	t.Parallel()
	// Initialize test accounts
	var (
		key, _  = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
		to      = crypto.PubkeyToAddress(key.PublicKey)
		genesis = &core.Genesis{
			Config: params.MergedTestChainConfig,
			Alloc:  types.GenesisAlloc{},
		}
		emptyBlob                      = new(kzg4844.Blob)
		emptyBlobs                     = []kzg4844.Blob{*emptyBlob}
		emptyBlobCommit, _             = kzg4844.BlobToCommitment(emptyBlob)
		emptyBlobProof, _              = kzg4844.ComputeBlobProof(emptyBlob, emptyBlobCommit)
		emptyBlobHash      common.Hash = kzg4844.CalcBlobHashV1(sha256.New(), &emptyBlobCommit)
	)
	b := newTestBackend(t, 1, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		b.SetPoS()
	})
	api := NewTransactionAPI(b, nil)
	type result struct {
		Hashes  []common.Hash
		Sidecar *types.BlobTxSidecar
	}
	suite := []struct {
		name string
		args TransactionArgs
		err  string
		want *result
	}{
		{
			name: "TestInvalidParamsCombination1",
			args: TransactionArgs{
				From:   &b.acc.Address,
				To:     &to,
				Value:  (*hexutil.Big)(big.NewInt(1)),
				Blobs:  []kzg4844.Blob{{}},
				Proofs: []kzg4844.Proof{{}},
			},
			err: `blob proofs provided while commitments were not`,
		},
		{
			name: "TestInvalidParamsCombination2",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				Blobs:       []kzg4844.Blob{{}},
				Commitments: []kzg4844.Commitment{{}},
			},
			err: `blob commitments provided while proofs were not`,
		},
		{
			name: "TestInvalidParamsCount1",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				Blobs:       []kzg4844.Blob{{}},
				Commitments: []kzg4844.Commitment{{}, {}},
				Proofs:      []kzg4844.Proof{{}, {}},
			},
			err: `number of blobs and commitments mismatch (have=2, want=1)`,
		},
		{
			name: "TestInvalidParamsCount2",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				Blobs:       []kzg4844.Blob{{}, {}},
				Commitments: []kzg4844.Commitment{{}, {}},
				Proofs:      []kzg4844.Proof{{}},
			},
			err: `number of blobs and proofs mismatch (have=1, want=2)`,
		},
		{
			name: "TestInvalidProofVerification",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				Blobs:       []kzg4844.Blob{{}, {}},
				Commitments: []kzg4844.Commitment{{}, {}},
				Proofs:      []kzg4844.Proof{{}, {}},
			},
			err: `failed to verify blob proof: short buffer`,
		},
		{
			name: "TestGenerateBlobHashes",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				Blobs:       emptyBlobs,
				Commitments: []kzg4844.Commitment{emptyBlobCommit},
				Proofs:      []kzg4844.Proof{emptyBlobProof},
			},
			want: &result{
				Hashes: []common.Hash{emptyBlobHash},
				Sidecar: &types.BlobTxSidecar{
					Blobs:       emptyBlobs,
					Commitments: []kzg4844.Commitment{emptyBlobCommit},
					Proofs:      []kzg4844.Proof{emptyBlobProof},
				},
			},
		},
		{
			name: "TestValidBlobHashes",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				BlobHashes:  []common.Hash{emptyBlobHash},
				Blobs:       emptyBlobs,
				Commitments: []kzg4844.Commitment{emptyBlobCommit},
				Proofs:      []kzg4844.Proof{emptyBlobProof},
			},
			want: &result{
				Hashes: []common.Hash{emptyBlobHash},
				Sidecar: &types.BlobTxSidecar{
					Blobs:       emptyBlobs,
					Commitments: []kzg4844.Commitment{emptyBlobCommit},
					Proofs:      []kzg4844.Proof{emptyBlobProof},
				},
			},
		},
		{
			name: "TestInvalidBlobHashes",
			args: TransactionArgs{
				From:        &b.acc.Address,
				To:          &to,
				Value:       (*hexutil.Big)(big.NewInt(1)),
				BlobHashes:  []common.Hash{{0x01, 0x22}},
				Blobs:       emptyBlobs,
				Commitments: []kzg4844.Commitment{emptyBlobCommit},
				Proofs:      []kzg4844.Proof{emptyBlobProof},
			},
			err: fmt.Sprintf("blob hash verification failed (have=%s, want=%s)", common.Hash{0x01, 0x22}, emptyBlobHash),
		},
		{
			name: "TestGenerateBlobProofs",
			args: TransactionArgs{
				From:  &b.acc.Address,
				To:    &to,
				Value: (*hexutil.Big)(big.NewInt(1)),
				Blobs: emptyBlobs,
			},
			want: &result{
				Hashes: []common.Hash{emptyBlobHash},
				Sidecar: &types.BlobTxSidecar{
					Blobs:       emptyBlobs,
					Commitments: []kzg4844.Commitment{emptyBlobCommit},
					Proofs:      []kzg4844.Proof{emptyBlobProof},
				},
			},
		},
	}
	for _, tc := range suite {
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()

			res, err := api.FillTransaction(context.Background(), tc.args)
			if len(tc.err) > 0 {
				if err == nil {
					t.Fatalf("missing error. want: %s", tc.err)
				} else if err.Error() != tc.err {
					t.Fatalf("error mismatch. want: %s, have: %s", tc.err, err.Error())
				}
				return
			}
			if err != nil && len(tc.err) == 0 {
				t.Fatalf("expected no error. have: %s", err)
			}
			if res == nil {
				t.Fatal("result missing")
			}
			want, err := json.Marshal(tc.want)
			if err != nil {
				t.Fatalf("failed to encode expected: %v", err)
			}
			have, err := json.Marshal(result{Hashes: res.Tx.BlobHashes(), Sidecar: res.Tx.BlobTxSidecar()})
			if err != nil {
				t.Fatalf("failed to encode computed sidecar: %v", err)
			}
			if !bytes.Equal(have, want) {
				t.Errorf("blob sidecar mismatch. Have: %s, want: %s", have, want)
			}
		})
	}
}

func argsFromTransaction(tx *types.Transaction, from common.Address) TransactionArgs {
	var (
		gas        = tx.Gas()
		nonce      = tx.Nonce()
		input      = tx.Data()
		accessList *types.AccessList
	)
	if acl := tx.AccessList(); acl != nil {
		accessList = &acl
	}
	return TransactionArgs{
		From:                 &from,
		To:                   tx.To(),
		Gas:                  (*hexutil.Uint64)(&gas),
		MaxFeePerGas:         (*hexutil.Big)(tx.GasFeeCap()),
		MaxPriorityFeePerGas: (*hexutil.Big)(tx.GasTipCap()),
		Value:                (*hexutil.Big)(tx.Value()),
		Nonce:                (*hexutil.Uint64)(&nonce),
		Input:                (*hexutil.Bytes)(&input),
		ChainID:              (*hexutil.Big)(tx.ChainId()),
		AccessList:           accessList,
		BlobFeeCap:           (*hexutil.Big)(tx.BlobGasFeeCap()),
		BlobHashes:           tx.BlobHashes(),
	}
}

type account struct {
	key  *ecdsa.PrivateKey
	addr common.Address
}

func newAccounts(n int) (accounts []account) {
	for i := 0; i < n; i++ {
		key, _ := crypto.GenerateKey()
		addr := crypto.PubkeyToAddress(key.PublicKey)
		accounts = append(accounts, account{key: key, addr: addr})
	}
	slices.SortFunc(accounts, func(a, b account) int { return a.addr.Cmp(b.addr) })
	return accounts
}

func newTestAccount() account {
	// testKey is a private key to use for funding a tester account.
	key, _ := crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
	// testAddr is the Ethereum address of the tester account.
	addr := crypto.PubkeyToAddress(key.PublicKey)
	return account{key: key, addr: addr}
}

func newRPCBalance(balance *big.Int) *hexutil.Big {
	rpcBalance := (*hexutil.Big)(balance)
	return rpcBalance
}

func hex2Bytes(str string) *hexutil.Bytes {
	rpcBytes := hexutil.Bytes(common.FromHex(str))
	return &rpcBytes
}

func newUint64(v uint64) *hexutil.Uint64 {
	rpcUint64 := hexutil.Uint64(v)
	return &rpcUint64
}

func newBytes(b []byte) *hexutil.Bytes {
	rpcBytes := hexutil.Bytes(b)
	return &rpcBytes
}

func uint256ToBytes(v *uint256.Int) *hexutil.Bytes {
	b := v.Bytes32()
	r := hexutil.Bytes(b[:])
	return &r
}

func TestRPCMarshalBlock(t *testing.T) {
	t.Parallel()
	var (
		txs []*types.Transaction
		to  = common.BytesToAddress([]byte{0x11})
	)
	for i := uint64(1); i <= 4; i++ {
		var tx *types.Transaction
		if i%2 == 0 {
			tx = types.NewTx(&types.LegacyTx{
				Nonce:    i,
				GasPrice: big.NewInt(11111),
				Gas:      1111,
				To:       &to,
				Value:    big.NewInt(111),
				Data:     []byte{0x11, 0x11, 0x11},
			})
		} else {
			tx = types.NewTx(&types.AccessListTx{
				ChainID:  big.NewInt(1337),
				Nonce:    i,
				GasPrice: big.NewInt(11111),
				Gas:      1111,
				To:       &to,
				Value:    big.NewInt(111),
				Data:     []byte{0x11, 0x11, 0x11},
			})
		}
		txs = append(txs, tx)
	}
	block := types.NewBlock(&types.Header{Number: big.NewInt(100)}, &types.Body{Transactions: txs}, nil, blocktest.NewHasher())

	var testSuite = []struct {
		inclTx bool
		fullTx bool
		want   string
	}{
		// without txs
		{
			inclTx: false,
			fullTx: false,
			want: `{
				"difficulty": "0x0",
				"extraData": "0x",
				"gasLimit": "0x0",
				"gasUsed": "0x0",
				"hash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
				"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
				"miner": "0x0000000000000000000000000000000000000000",
				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"nonce": "0x0000000000000000",
				"number": "0x64",
				"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
				"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
				"size": "0x296",
				"stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"timestamp": "0x0",
				"transactionsRoot": "0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e",
				"uncles": []
			}`,
		},
		// only tx hashes
		{
			inclTx: true,
			fullTx: false,
			want: `{
				"difficulty": "0x0",
				"extraData": "0x",
				"gasLimit": "0x0",
				"gasUsed": "0x0",
				"hash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
				"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
				"miner": "0x0000000000000000000000000000000000000000",
				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"nonce": "0x0000000000000000",
				"number": "0x64",
				"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
				"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
				"size": "0x296",
				"stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"timestamp": "0x0",
				"transactions": [
					"0x7d39df979e34172322c64983a9ad48302c2b889e55bda35324afecf043a77605",
					"0x9bba4c34e57c875ff57ac8d172805a26ae912006985395dc1bdf8f44140a7bf4",
					"0x98909ea1ff040da6be56bc4231d484de1414b3c1dac372d69293a4beb9032cb5",
					"0x12e1f81207b40c3bdcc13c0ee18f5f86af6d31754d57a0ea1b0d4cfef21abef1"
				],
				"transactionsRoot": "0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e",
				"uncles": []
			}`,
		},
		// full tx details
		{
			inclTx: true,
			fullTx: true,
			want: `{
				"difficulty": "0x0",
				"extraData": "0x",
				"gasLimit": "0x0",
				"gasUsed": "0x0",
				"hash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
				"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
				"miner": "0x0000000000000000000000000000000000000000",
				"mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"nonce": "0x0000000000000000",
				"number": "0x64",
				"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"receiptsRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
				"sha3Uncles": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
				"size": "0x296",
				"stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
				"timestamp": "0x0",
				"transactions": [
					{
						"blockHash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
						"blockNumber": "0x64",
						"from": "0x0000000000000000000000000000000000000000",
						"gas": "0x457",
						"gasPrice": "0x2b67",
						"hash": "0x7d39df979e34172322c64983a9ad48302c2b889e55bda35324afecf043a77605",
						"input": "0x111111",
						"nonce": "0x1",
						"to": "0x0000000000000000000000000000000000000011",
						"transactionIndex": "0x0",
						"value": "0x6f",
						"type": "0x1",
						"accessList": [],
						"chainId": "0x539",
						"v": "0x0",
						"r": "0x0",
						"s": "0x0",
						"yParity": "0x0"
					},
					{
						"blockHash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
						"blockNumber": "0x64",
						"from": "0x0000000000000000000000000000000000000000",
						"gas": "0x457",
						"gasPrice": "0x2b67",
						"hash": "0x9bba4c34e57c875ff57ac8d172805a26ae912006985395dc1bdf8f44140a7bf4",
						"input": "0x111111",
						"nonce": "0x2",
						"to": "0x0000000000000000000000000000000000000011",
						"transactionIndex": "0x1",
						"value": "0x6f",
						"type": "0x0",
						"chainId": "0x7fffffffffffffee",
						"v": "0x0",
						"r": "0x0",
						"s": "0x0"
					},
					{
						"blockHash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
						"blockNumber": "0x64",
						"from": "0x0000000000000000000000000000000000000000",
						"gas": "0x457",
						"gasPrice": "0x2b67",
						"hash": "0x98909ea1ff040da6be56bc4231d484de1414b3c1dac372d69293a4beb9032cb5",
						"input": "0x111111",
						"nonce": "0x3",
						"to": "0x0000000000000000000000000000000000000011",
						"transactionIndex": "0x2",
						"value": "0x6f",
						"type": "0x1",
						"accessList": [],
						"chainId": "0x539",
						"v": "0x0",
						"r": "0x0",
						"s": "0x0",
						"yParity": "0x0"
					},
					{
						"blockHash": "0x9b73c83b25d0faf7eab854e3684c7e394336d6e135625aafa5c183f27baa8fee",
						"blockNumber": "0x64",
						"from": "0x0000000000000000000000000000000000000000",
						"gas": "0x457",
						"gasPrice": "0x2b67",
						"hash": "0x12e1f81207b40c3bdcc13c0ee18f5f86af6d31754d57a0ea1b0d4cfef21abef1",
						"input": "0x111111",
						"nonce": "0x4",
						"to": "0x0000000000000000000000000000000000000011",
						"transactionIndex": "0x3",
						"value": "0x6f",
						"type": "0x0",
						"chainId": "0x7fffffffffffffee",
						"v": "0x0",
						"r": "0x0",
						"s": "0x0"
					}
				],
				"transactionsRoot": "0x661a9febcfa8f1890af549b874faf9fa274aede26ef489d9db0b25daa569450e",
				"uncles": []
			}`,
		},
	}

	for i, tc := range testSuite {
		resp := RPCMarshalBlock(block, tc.inclTx, tc.fullTx, params.MainnetChainConfig)
		out, err := json.Marshal(resp)
		if err != nil {
			t.Errorf("test %d: json marshal error: %v", i, err)
			continue
		}
		require.JSONEqf(t, tc.want, string(out), "test %d", i)
	}
}

func TestRPCGetBlockOrHeader(t *testing.T) {
	t.Parallel()

	// Initialize test accounts
	var (
		acc1Key, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
		acc2Key, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
		acc1Addr   = crypto.PubkeyToAddress(acc1Key.PublicKey)
		acc2Addr   = crypto.PubkeyToAddress(acc2Key.PublicKey)
		genesis    = &core.Genesis{
			Config: params.TestChainConfig,
			Alloc: types.GenesisAlloc{
				acc1Addr: {Balance: big.NewInt(params.Ether)},
				acc2Addr: {Balance: big.NewInt(params.Ether)},
			},
		}
		genBlocks = 10
		signer    = types.HomesteadSigner{}
		tx        = types.NewTx(&types.LegacyTx{
			Nonce:    11,
			GasPrice: big.NewInt(11111),
			Gas:      1111,
			To:       &acc2Addr,
			Value:    big.NewInt(111),
			Data:     []byte{0x11, 0x11, 0x11},
		})
		withdrawal = &types.Withdrawal{
			Index:     0,
			Validator: 1,
			Address:   common.Address{0x12, 0x34},
			Amount:    10,
		}
		pending = types.NewBlock(&types.Header{Number: big.NewInt(11), Time: 42}, &types.Body{Transactions: types.Transactions{tx}, Withdrawals: types.Withdrawals{withdrawal}}, nil, blocktest.NewHasher())
	)
	backend := newTestBackend(t, genBlocks, genesis, ethash.NewFaker(), func(i int, b *core.BlockGen) {
		// Transfer from account[0] to account[1]
		//    value: 1000 wei
		//    fee:   0 wei
		tx, _ := types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &acc2Addr, Value: big.NewInt(1000), Gas: params.TxGas, GasPrice: b.BaseFee(), Data: nil}), signer, acc1Key)
		b.AddTx(tx)
	})
	backend.setPendingBlock(pending)
	api := NewBlockChainAPI(backend)
	blockHashes := make([]common.Hash, genBlocks+1)
	ctx := context.Background()
	for i := 0; i <= genBlocks; i++ {
		header, err := backend.HeaderByNumber(ctx, rpc.BlockNumber(i))
		if err != nil {
			t.Errorf("failed to get block: %d err: %v", i, err)
		}
		blockHashes[i] = header.Hash()
	}
	pendingHash := pending.Hash()

	var testSuite = []struct {
		blockNumber rpc.BlockNumber
		blockHash   *common.Hash
		fullTx      bool
		reqHeader   bool
		file        string
		expectErr   error
	}{
		// 0. latest header
		{
			blockNumber: rpc.LatestBlockNumber,
			reqHeader:   true,
			file:        "tag-latest",
		},
		// 1. genesis header
		{
			blockNumber: rpc.BlockNumber(0),
			reqHeader:   true,
			file:        "number-0",
		},
		// 2. #1 header
		{
			blockNumber: rpc.BlockNumber(1),
			reqHeader:   true,
			file:        "number-1",
		},
		// 3. latest-1 header
		{
			blockNumber: rpc.BlockNumber(9),
			reqHeader:   true,
			file:        "number-latest-1",
		},
		// 4. latest+1 header
		{
			blockNumber: rpc.BlockNumber(11),
			reqHeader:   true,
			file:        "number-latest+1",
		},
		// 5. pending header
		{
			blockNumber: rpc.PendingBlockNumber,
			reqHeader:   true,
			file:        "tag-pending",
		},
		// 6. latest block
		{
			blockNumber: rpc.LatestBlockNumber,
			file:        "tag-latest",
		},
		// 7. genesis block
		{
			blockNumber: rpc.BlockNumber(0),
			file:        "number-0",
		},
		// 8. #1 block
		{
			blockNumber: rpc.BlockNumber(1),
			file:        "number-1",
		},
		// 9. latest-1 block
		{
			blockNumber: rpc.BlockNumber(9),
			fullTx:      true,
			file:        "number-latest-1",
		},
		// 10. latest+1 block
		{
			blockNumber: rpc.BlockNumber(11),
			fullTx:      true,
			file:        "number-latest+1",
		},
		// 11. pending block
		{
			blockNumber: rpc.PendingBlockNumber,
			file:        "tag-pending",
		},
		// 12. pending block + fullTx
		{
			blockNumber: rpc.PendingBlockNumber,
			fullTx:      true,
			file:        "tag-pending-fullTx",
		},
		// 13. latest header by hash
		{
			blockHash: &blockHashes[len(blockHashes)-1],
			reqHeader: true,
			file:      "hash-latest",
		},
		// 14. genesis header by hash
		{
			blockHash: &blockHashes[0],
			reqHeader: true,
			file:      "hash-0",
		},
		// 15. #1 header
		{
			blockHash: &blockHashes[1],
			reqHeader: true,
			file:      "hash-1",
		},
		// 16. latest-1 header
		{
			blockHash: &blockHashes[len(blockHashes)-2],
			reqHeader: true,
			file:      "hash-latest-1",
		},
		// 17. empty hash
		{
			blockHash: &common.Hash{},
			reqHeader: true,
			file:      "hash-empty",
		},
		// 18. pending hash
		{
			blockHash: &pendingHash,
			reqHeader: true,
			file:      `hash-pending`,
		},
		// 19. latest block
		{
			blockHash: &blockHashes[len(blockHashes)-1],
			file:      "hash-latest",
		},
		// 20. genesis block
		{
			blockHash: &blockHashes[0],
			file:      "hash-genesis",
		},
		// 21. #1 block
		{
			blockHash: &blockHashes[1],
			file:      "hash-1",
		},
		// 22. latest-1 block
		{
			blockHash: &blockHashes[len(blockHashes)-2],
			fullTx:    true,
			file:      "hash-latest-1-fullTx",
		},
		// 23. empty hash + body
		{
			blockHash: &common.Hash{},
			fullTx:    true,
			file:      "hash-empty-fullTx",
		},
		// 24. pending block
		{
			blockHash: &pendingHash,
			file:      `hash-pending`,
		},
		// 25. pending block + fullTx
		{
			blockHash: &pendingHash,
			fullTx:    true,
			file:      "hash-pending-fullTx",
		},
	}

	for i, tt := range testSuite {
		var (
			result map[string]interface{}
			err    error
			rpc    string
		)
		if tt.blockHash != nil {
			if tt.reqHeader {
				result = api.GetHeaderByHash(context.Background(), *tt.blockHash)
				rpc = "eth_getHeaderByHash"
			} else {
				result, err = api.GetBlockByHash(context.Background(), *tt.blockHash, tt.fullTx)
				rpc = "eth_getBlockByHash"
			}
		} else {
			if tt.reqHeader {
				result, err = api.GetHeaderByNumber(context.Background(), tt.blockNumber)
				rpc = "eth_getHeaderByNumber"
			} else {
				result, err = api.GetBlockByNumber(context.Background(), tt.blockNumber, tt.fullTx)
				rpc = "eth_getBlockByNumber"
			}
		}
		if tt.expectErr != nil {
			if err == nil {
				t.Errorf("test %d: want error %v, have nothing", i, tt.expectErr)
				continue
			}
			if !errors.Is(err, tt.expectErr) {
				t.Errorf("test %d: error mismatch, want %v, have %v", i, tt.expectErr, err)
			}
			continue
		}
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}

		testRPCResponseWithFile(t, i, result, rpc, tt.file)
	}
}

func setupReceiptBackend(t *testing.T, genBlocks int) (*testBackend, []common.Hash) {
	config := *params.MergedTestChainConfig
	var (
		acc1Key, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
		acc2Key, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
		acc1Addr   = crypto.PubkeyToAddress(acc1Key.PublicKey)
		acc2Addr   = crypto.PubkeyToAddress(acc2Key.PublicKey)
		contract   = common.HexToAddress("0000000000000000000000000000000000031ec7")
		genesis    = &core.Genesis{
			Config:        &config,
			ExcessBlobGas: new(uint64),
			BlobGasUsed:   new(uint64),
			Alloc: types.GenesisAlloc{
				acc1Addr: {Balance: big.NewInt(params.Ether)},
				acc2Addr: {Balance: big.NewInt(params.Ether)},
				// // SPDX-License-Identifier: GPL-3.0
				// pragma solidity >=0.7.0 <0.9.0;
				//
				// contract Token {
				//     event Transfer(address indexed from, address indexed to, uint256 value);
				//     function transfer(address to, uint256 value) public returns (bool) {
				//         emit Transfer(msg.sender, to, value);
				//         return true;
				//     }
				// }
				contract: {Balance: big.NewInt(params.Ether), Code: common.FromHex("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")},
			},
		}
		signer   = types.LatestSignerForChainID(params.TestChainConfig.ChainID)
		txHashes = make([]common.Hash, genBlocks)
	)

	backend := newTestBackend(t, genBlocks, genesis, beacon.New(ethash.NewFaker()), func(i int, b *core.BlockGen) {
		var (
			tx  *types.Transaction
			err error
		)
		b.SetPoS()
		switch i {
		case 0:
			// transfer 1000wei
			tx, err = types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &acc2Addr, Value: big.NewInt(1000), Gas: params.TxGas, GasPrice: b.BaseFee(), Data: nil}), types.HomesteadSigner{}, acc1Key)
		case 1:
			// create contract
			tx, err = types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: nil, Gas: 53100, GasPrice: b.BaseFee(), Data: common.FromHex("0x60806040")}), signer, acc1Key)
		case 2:
			// with logs
			// transfer(address to, uint256 value)
			data := fmt.Sprintf("0xa9059cbb%s%s", common.HexToHash(common.BigToAddress(big.NewInt(int64(i + 1))).Hex()).String()[2:], common.BytesToHash([]byte{byte(i + 11)}).String()[2:])
			tx, err = types.SignTx(types.NewTx(&types.LegacyTx{Nonce: uint64(i), To: &contract, Gas: 60000, GasPrice: b.BaseFee(), Data: common.FromHex(data)}), signer, acc1Key)
		case 3:
			// dynamic fee with logs
			// transfer(address to, uint256 value)
			data := fmt.Sprintf("0xa9059cbb%s%s", common.HexToHash(common.BigToAddress(big.NewInt(int64(i + 1))).Hex()).String()[2:], common.BytesToHash([]byte{byte(i + 11)}).String()[2:])
			fee := big.NewInt(500)
			fee.Add(fee, b.BaseFee())
			tx, err = types.SignTx(types.NewTx(&types.DynamicFeeTx{Nonce: uint64(i), To: &contract, Gas: 60000, Value: big.NewInt(1), GasTipCap: big.NewInt(500), GasFeeCap: fee, Data: common.FromHex(data)}), signer, acc1Key)
		case 4:
			// access list with contract create
			accessList := types.AccessList{{
				Address:     contract,
				StorageKeys: []common.Hash{{0}},
			}}
			tx, err = types.SignTx(types.NewTx(&types.AccessListTx{Nonce: uint64(i), To: nil, Gas: 58100, GasPrice: b.BaseFee(), Data: common.FromHex("0x60806040"), AccessList: accessList}), signer, acc1Key)
		case 5:
			// blob tx
			fee := big.NewInt(500)
			fee.Add(fee, b.BaseFee())
			tx, err = types.SignTx(types.NewTx(&types.BlobTx{
				Nonce:      uint64(i),
				GasTipCap:  uint256.NewInt(1),
				GasFeeCap:  uint256.MustFromBig(fee),
				Gas:        params.TxGas,
				To:         acc2Addr,
				BlobFeeCap: uint256.NewInt(1),
				BlobHashes: []common.Hash{{1}},
				Value:      new(uint256.Int),
			}), signer, acc1Key)

		case 6:
			// blob tx with blobSidecar
			blobSidecars := makeBlkSidecars(1, 1)
			blobHashes := blobSidecars[0].BlobHashes()
			fee := big.NewInt(500)
			fee.Add(fee, b.BaseFee())
			tx, err = types.SignTx(types.NewTx(&types.BlobTx{
				Nonce:      uint64(i),
				GasTipCap:  uint256.NewInt(1),
				GasFeeCap:  uint256.MustFromBig(fee),
				Gas:        params.TxGas,
				To:         acc2Addr,
				BlobFeeCap: uint256.NewInt(1),
				BlobHashes: blobHashes,
				Value:      new(uint256.Int),
			}), signer, acc1Key)
			b.AddBlobSidecar(&types.BlobSidecar{
				BlobTxSidecar: *blobSidecars[0],
				TxHash:        tx.Hash(),
				TxIndex:       0,
			})
		}
		if err != nil {
			t.Errorf("failed to sign tx: %v", err)
		}
		if tx != nil {
			b.AddTx(tx)
			txHashes[i] = tx.Hash()
		}
	})
	return backend, txHashes
}

func TestRPCGetTransactionReceipt(t *testing.T) {
	t.Parallel()

	var (
		backend, txHashes = setupReceiptBackend(t, 6)
		api               = NewTransactionAPI(backend, new(AddrLocker))
	)

	var testSuite = []struct {
		txHash common.Hash
		file   string
	}{
		// 0. normal success
		{
			txHash: txHashes[0],
			file:   "normal-transfer-tx",
		},
		// 1. create contract
		{
			txHash: txHashes[1],
			file:   "create-contract-tx",
		},
		// 2. with logs success
		{
			txHash: txHashes[2],
			file:   "with-logs",
		},
		// 3. dynamic tx with logs success
		{
			txHash: txHashes[3],
			file:   `dynamic-tx-with-logs`,
		},
		// 4. access list tx with create contract
		{
			txHash: txHashes[4],
			file:   "create-contract-with-access-list",
		},
		// 5. txhash empty
		{
			txHash: common.Hash{},
			file:   "txhash-empty",
		},
		// 6. txhash not found
		{
			txHash: common.HexToHash("deadbeef"),
			file:   "txhash-notfound",
		},
		// 7. blob tx
		{
			txHash: txHashes[5],
			file:   "blob-tx",
		},
	}

	for i, tt := range testSuite {
		var (
			result interface{}
			err    error
		)
		result, err = api.GetTransactionReceipt(context.Background(), tt.txHash)
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}
		testRPCResponseWithFile(t, i, result, "eth_getTransactionReceipt", tt.file)
	}
}

func TestRPCGetBlockReceipts(t *testing.T) {
	t.Parallel()

	var (
		genBlocks  = 6
		backend, _ = setupReceiptBackend(t, genBlocks)
		api        = NewBlockChainAPI(backend)
	)
	blockHashes := make([]common.Hash, genBlocks+1)
	ctx := context.Background()
	for i := 0; i <= genBlocks; i++ {
		header, err := backend.HeaderByNumber(ctx, rpc.BlockNumber(i))
		if err != nil {
			t.Errorf("failed to get block: %d err: %v", i, err)
		}
		blockHashes[i] = header.Hash()
	}

	var testSuite = []struct {
		test rpc.BlockNumberOrHash
		file string
	}{
		// 0. block without any txs(hash)
		{
			test: rpc.BlockNumberOrHashWithHash(blockHashes[0], false),
			file: "number-0",
		},
		// 1. block without any txs(number)
		{
			test: rpc.BlockNumberOrHashWithNumber(0),
			file: "number-1",
		},
		// 2. earliest tag
		{
			test: rpc.BlockNumberOrHashWithNumber(rpc.EarliestBlockNumber),
			file: "tag-earliest",
		},
		// 3. latest tag
		{
			test: rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber),
			file: "tag-latest",
		},
		// 4. block with legacy transfer tx(hash)
		{
			test: rpc.BlockNumberOrHashWithHash(blockHashes[1], false),
			file: "block-with-legacy-transfer-tx",
		},
		// 5. block with contract create tx(number)
		{
			test: rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(2)),
			file: "block-with-contract-create-tx",
		},
		// 6. block with legacy contract call tx(hash)
		{
			test: rpc.BlockNumberOrHashWithHash(blockHashes[3], false),
			file: "block-with-legacy-contract-call-tx",
		},
		// 7. block with dynamic fee tx(number)
		{
			test: rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(4)),
			file: "block-with-dynamic-fee-tx",
		},
		// 8. block is empty
		{
			test: rpc.BlockNumberOrHashWithHash(common.Hash{}, false),
			file: "hash-empty",
		},
		// 9. block is not found
		{
			test: rpc.BlockNumberOrHashWithHash(common.HexToHash("deadbeef"), false),
			file: "hash-notfound",
		},
		// 10. block is not found
		{
			test: rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(genBlocks + 1)),
			file: "block-notfound",
		},
		// 11. block with blob tx
		{
			test: rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(6)),
			file: "block-with-blob-tx",
		},
	}

	for i, tt := range testSuite {
		var (
			result interface{}
			err    error
		)
		result, err = api.GetBlockReceipts(context.Background(), tt.test)
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}
		testRPCResponseWithFile(t, i, result, "eth_getBlockReceipts", tt.file)
	}
}

func makeBlkSidecars(n, nPerTx int) []*types.BlobTxSidecar {
	if n <= 0 {
		return nil
	}
	ret := make([]*types.BlobTxSidecar, n)
	for i := 0; i < n; i++ {
		blobs := make([]kzg4844.Blob, nPerTx)
		commitments := make([]kzg4844.Commitment, nPerTx)
		proofs := make([]kzg4844.Proof, nPerTx)
		for i := 0; i < nPerTx; i++ {
			commitments[i], _ = kzg4844.BlobToCommitment(&blobs[i])
			proofs[i], _ = kzg4844.ComputeBlobProof(&blobs[i], commitments[i])
		}
		ret[i] = &types.BlobTxSidecar{
			Blobs:       blobs,
			Commitments: commitments,
			Proofs:      proofs,
		}
	}
	return ret
}

func TestRPCGetBlobSidecars(t *testing.T) {
	t.Parallel()
	var (
		genBlocks  = 7
		backend, _ = setupReceiptBackend(t, genBlocks)
		api        = NewBlockChainAPI(backend)
	)
	blockHashes := make([]common.Hash, genBlocks+1)
	ctx := context.Background()
	for i := 0; i <= genBlocks; i++ {
		header, err := backend.HeaderByNumber(ctx, rpc.BlockNumber(i))
		if err != nil {
			t.Errorf("failed to get block: %d err: %v", i, err)
		}
		blockHashes[i] = header.Hash()
	}

	var testSuite = []struct {
		test     rpc.BlockNumberOrHash
		fullBlob bool
		file     string
	}{
		// 0. block without any txs(number)
		{
			test:     rpc.BlockNumberOrHashWithNumber(0),
			fullBlob: true,
			file:     "number-1",
		},
		// 1. earliest tag
		{
			test:     rpc.BlockNumberOrHashWithNumber(rpc.EarliestBlockNumber),
			fullBlob: true,
			file:     "tag-earliest",
		},
		// 2. latest tag
		{
			test:     rpc.BlockNumberOrHashWithNumber(rpc.LatestBlockNumber),
			fullBlob: true,
			file:     "tag-latest",
		},
		// 3. block is empty
		{
			test:     rpc.BlockNumberOrHashWithHash(common.Hash{}, false),
			fullBlob: true,
			file:     "hash-empty",
		},
		// 4. block is not found
		{
			test:     rpc.BlockNumberOrHashWithHash(common.HexToHash("deadbeef"), false),
			fullBlob: true,
			file:     "hash-notfound",
		},
		// 5. block is not found
		{
			test:     rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(genBlocks + 1)),
			fullBlob: true,
			file:     "block-notfound",
		},
		// 6. block with blob tx
		{
			test:     rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(6)),
			fullBlob: true,
			file:     "block-with-blob-tx",
		},
		// 7. block with sidecar
		{
			test:     rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(7)),
			fullBlob: true,
			file:     "block-with-blobSidecars",
		},
		// 8. block with sidecar but show little
		{
			test:     rpc.BlockNumberOrHashWithNumber(rpc.BlockNumber(7)),
			fullBlob: false,
			file:     "block-with-blobSidecars-show-little",
		},
	}

	for i, tt := range testSuite {
		var (
			result interface{}
			err    error
		)
		result, err = api.GetBlobSidecars(context.Background(), tt.test, &tt.fullBlob)
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}
		testRPCResponseWithFile(t, i, result, "eth_getBlobSidecars", tt.file)
	}
}

type precompileContract struct{}

func (p *precompileContract) RequiredGas(input []byte) uint64 { return 0 }

func (p *precompileContract) Run(input []byte) ([]byte, error) { return nil, nil }

func TestStateOverrideMovePrecompile(t *testing.T) {
	db := state.NewDatabase(triedb.NewDatabase(rawdb.NewMemoryDatabase(), nil), nil)
	statedb, err := state.New(common.Hash{}, db)
	if err != nil {
		t.Fatalf("failed to create statedb: %v", err)
	}
	precompiles := map[common.Address]vm.PrecompiledContract{
		common.BytesToAddress([]byte{0x1}): &precompileContract{},
		common.BytesToAddress([]byte{0x2}): &precompileContract{},
	}
	bytes2Addr := func(b []byte) *common.Address {
		a := common.BytesToAddress(b)
		return &a
	}
	var testSuite = []struct {
		overrides           StateOverride
		expectedPrecompiles map[common.Address]struct{}
		fail                bool
	}{
		{
			overrides: StateOverride{
				common.BytesToAddress([]byte{0x1}): {
					Code:             hex2Bytes("0xff"),
					MovePrecompileTo: bytes2Addr([]byte{0x2}),
				},
				common.BytesToAddress([]byte{0x2}): {
					Code: hex2Bytes("0x00"),
				},
			},
			// 0x2 has already been touched by the moveTo.
			fail: true,
		}, {
			overrides: StateOverride{
				common.BytesToAddress([]byte{0x1}): {
					Code:             hex2Bytes("0xff"),
					MovePrecompileTo: bytes2Addr([]byte{0xff}),
				},
				common.BytesToAddress([]byte{0x3}): {
					Code:             hex2Bytes("0x00"),
					MovePrecompileTo: bytes2Addr([]byte{0xfe}),
				},
			},
			// 0x3 is not a precompile.
			fail: true,
		}, {
			overrides: StateOverride{
				common.BytesToAddress([]byte{0x1}): {
					Code:             hex2Bytes("0xff"),
					MovePrecompileTo: bytes2Addr([]byte{0xff}),
				},
				common.BytesToAddress([]byte{0x2}): {
					Code:             hex2Bytes("0x00"),
					MovePrecompileTo: bytes2Addr([]byte{0xfe}),
				},
			},
			expectedPrecompiles: map[common.Address]struct{}{common.BytesToAddress([]byte{0xfe}): {}, common.BytesToAddress([]byte{0xff}): {}},
		},
	}

	for i, tt := range testSuite {
		cpy := maps.Clone(precompiles)
		// Apply overrides
		err := tt.overrides.Apply(statedb, cpy)
		if tt.fail {
			if err == nil {
				t.Errorf("test %d: want error, have nothing", i)
			}
			continue
		}
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}
		// Precompile keys
		if len(cpy) != len(tt.expectedPrecompiles) {
			t.Errorf("test %d: precompile mismatch, want %d, have %d", i, len(tt.expectedPrecompiles), len(cpy))
		}
		for k := range tt.expectedPrecompiles {
			if _, ok := cpy[k]; !ok {
				t.Errorf("test %d: precompile not found: %s", i, k.String())
			}
		}
	}
}

func TestGetBlobSidecarByTxHash(t *testing.T) {
	t.Parallel()
	var (
		backend, txHashs = setupReceiptBackend(t, 7)
		api              = NewBlockChainAPI(backend)
	)
	var testSuite = []struct {
		test     common.Hash
		fullBlob bool
		file     string
	}{
		// 0. txHash is empty
		{
			test:     common.Hash{},
			fullBlob: true,
			file:     "hash-empty",
		},
		// 1. txHash is not found
		{
			test:     common.HexToHash("deadbeef"),
			fullBlob: true,
			file:     "hash-notfound",
		},
		// 2. txHash is not blob tx
		{
			test:     common.HexToHash("deadbeef"),
			fullBlob: true,
			file:     "not-blob-tx",
		},
		// 3. block with blob tx without sidecar
		{
			test:     txHashs[5],
			fullBlob: true,
			file:     "block-with-blob-tx",
		},
		// 4. block with sidecar
		{
			test:     txHashs[6],
			fullBlob: true,
			file:     "block-with-blobSidecars",
		},
		// 5. block show part blobs
		{
			test:     txHashs[6],
			fullBlob: false,
			file:     "block-with-blobSidecars-show-little",
		},
	}

	for i, tt := range testSuite {
		var (
			result interface{}
			err    error
		)
		result, err = api.GetBlobSidecarByTxHash(context.Background(), tt.test, &tt.fullBlob)
		if err != nil {
			t.Errorf("test %d: want no error, have %v", i, err)
			continue
		}
		testRPCResponseWithFile(t, i, result, "eth_getBlobSidecarByTxHash", tt.file)
	}
}

func testRPCResponseWithFile(t *testing.T, testid int, result interface{}, rpc string, file string) {
	data, err := json.MarshalIndent(result, "", "  ")
	if err != nil {
		t.Errorf("test %d: json marshal error", testid)
		return
	}
	outputFile := filepath.Join("testdata", fmt.Sprintf("%s-%s.json", rpc, file))
	if os.Getenv("WRITE_TEST_FILES") != "" {
		os.WriteFile(outputFile, data, 0644)
	}
	want, err := os.ReadFile(outputFile)
	if err != nil {
		t.Fatalf("error reading expected test file: %s output: %v", outputFile, err)
	}
	require.JSONEqf(t, string(want), string(data), "test %d: json not match, want: %s, have: %s", testid, string(want), string(data))
}

func addressToHash(a common.Address) common.Hash {
	return common.BytesToHash(a.Bytes())
}
